Dimming Ballast

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Triad C2642UNVME Electronic Ballast Compact Fluorescent $10.00 Time Remaining: 25d 9h 58m Buy It Now for only: $10.00 Buy It Now | Add to watch list

fdb 4843 120 2 hi lume new unused electronic dimming ballast 2 lite f40 lutron $27.00 Time Remaining: 4h 21m Buy It Now for only: $33.00 Buy It Now | Bid now | Add to watch list

NEW PHILIPS HDF242T4 COMPACT FLUORESCENT DIMMING BALLAST 2 QUAD or TRIPLE CFL $39.00 Time Remaining: 6d 14h 45m Buy It Now for only: $39.00 Buy It Now | Add to watch list

LUTRON FDB T426 277 2 S 277V ELECTORNIC FLUORESCENT DIMMING BALLAST NIB $110.95 Time Remaining: 29d 9h 13m Buy It Now for only: $110.95 Buy It Now | Add to watch list

39W Aquarium Reptile T5 HO Ballast 2 lamp Philips Advance Lightolier Dimming $7.99 Time Remaining: 24d 7h 10m Buy It Now for only: $7.99 Buy It Now | Add to watch list

Lutron Dimming Ballast FDB T432 120 1 S $19.95 Time Remaining: 27d 7h 19m Buy It Now for only: $19.95 Buy It Now | Add to watch list

New Triad Ballast CF Electronic Ballast C2642UNVME $14.99 Time Remaining: 11d 6h 34m Buy It Now for only: $14.99 Buy It Now | Add to watch list

Mark 10 Powerline VEZ 3S32SC Ballast F32T8 RS IS NEW $43.50 Time Remaining: 1d 58m Buy It Now for only: $43.50 Buy It Now | Add to watch list

Advance REZ 1S32 SC Electronic Dimming Ballast 1X F32T8 $55.00 Time Remaining: 28d 5h 6m Buy It Now for only: $55.00 Buy It Now | Add to watch list

1 BALLAST GE232MVPS H V03 75383 UltraStart 0 10V Dimming 100 3 Ballast $35.00 Time Remaining: 12d 5h 10m Buy It Now for only: $35.00 Buy It Now | Add to watch list

1 UNIVERSAL BRAND DIMMING ELECTRONIC BALLAST B232PULV50 A 120 277V $30.99 Time Remaining: 3d 5h 28m Buy It Now for only: $30.99 Buy It Now | Add to watch list

Sylvania 50707 QTP2X32T8 UNV DIM TC T8 Fluorescent Dimming Ballast $40.00 Time Remaining: 1d 5h 57m Buy It Now for only: $40.00 Buy It Now | Add to watch list

Sylvania QTP2x26CF UNV DALI 2 Lamp CF Dimming Ballast $38.24 Time Remaining: 27d 10h 2m Buy It Now for only: $38.24 Buy It Now | Add to watch list

Lutron Dimming Ballast FDB T432 120 1 S Lot of four $69.99 Time Remaining: 4d 33m Buy It Now for only: $69.99 Buy It Now | Add to watch list

LUTRON FDB 4843 120 2 HI LUME ELECTRONIC DIMMING FLORESCENT BALLAST 2 F40T12 $23.00 Time Remaining: 15d 12m Buy It Now for only: $23.00 Buy It Now | Add to watch list

2 Daylight Harvesting Ballast Just Right Light F13800 $9.99 Time Remaining: 45m Bid now | Add to watch list

Sylvania 50714 QTP3X32T8 UNV DIM TCL T8 Fluorescent Dimming Ballast $40.00 Time Remaining: 1d 5h 32m Buy It Now for only: $40.00 Buy It Now | Add to watch list

T8 Fluorescent Dimming Sleeve Tubeguard NEW $11.50 Time Remaining: 26d 3h 22m Buy It Now for only: $11.50 Buy It Now | Add to watch list

PHILIPS ADVANCE LIGHTOLIER POWERSPEC HDF128T5 DIMMING T5 FLOURESCENT BALLAST $10.00 Time Remaining: 26d 6h 22m Buy It Now for only: $10.00 Buy It Now | Add to watch list

SYLVANIA QTP 2X28T5 UNV DIM TCL 2 Lamp 28T5 Dimming RS Electronic Ballast NEW $35.00 Time Remaining: 14d 10h 7m Buy It Now for only: $35.00 Buy It Now | Add to watch list

New Phillips Advance Ballast Centium ICN 2S28 N $14.99 Time Remaining: 11d 6h 34m Buy It Now for only: $14.99 Buy It Now | Add to watch list

Advance REZ 2S32 SC Electronic Dimming Ballast 2X F32T8 $60.00 Time Remaining: 5d 5h 22m Buy It Now for only: $60.00 Buy It Now | Add to watch list

SUPER HID 39W ELECTRONIC BALLAST METAL HALIDE 120 277V METROLIGHT DIMMING 0 10V $38.00 Time Remaining: 24d 12h 6m Buy It Now for only: $38.00 Buy It Now | Add to watch list

LUTRON HI LUME FDB T426 120 1 S FLUORESCENT LIGHT DIMMING BALLAST COMPACT SE 5 $88.88 Time Remaining: 4d 16h 5m Buy It Now for only: $88.88 Buy It Now | Add to watch list

Universal B228PUNVSV3 D Dimming Ballast For F28T5 Lamps $63.74 Time Remaining: 20d 4h 16m Buy It Now for only: $63.74 Buy It Now | Add to watch list

39W T5 HO Ballast 2 lamp Philips Advance Lightolier Dimming HDF239T5HO $7.99 Time Remaining: 24d 7h 10m Buy It Now for only: $7.99 Buy It Now | Add to watch list

Motorola Rapid Start Gold Edition T8 Dimming Ballast $19.95 Time Remaining: 7d 10h 1m Buy It Now for only: $19.95 Buy It Now | Add to watch list

Daylight Harvesting Just Right Light White Sensor SW $2.00 Time Remaining: 17d 44m Buy It Now for only: $2.00 Buy It Now | Add to watch list

1 Advance RZT 2S54 Electronic Dimming Ballast $55.00 Time Remaining: 1d 4h 22m Buy It Now for only: $55.00 Buy It Now | Add to watch list

LUTRON H3DT832CU210 Dimming Ballast Electronic 3D T8 2 Lamp $30.00 Time Remaining: 5h 10m Bid now | Add to watch list

NEWGE Proline GE 332 120 N Instant Start T8 Ballast $10.50 Time Remaining: 24d 8h 42m Buy It Now for only: $10.50 Buy It Now | Add to watch list

Daylight Harvesting Ballast Just Right Light F22800 $9.95 Time Remaining: 6d 42m Buy It Now for only: $9.95 Buy It Now | Add to watch list

Lutron FDB T432 120 2 S Compact SE Electronic Fluorescent Dimming Ballast $19.99 Time Remaining: 20d 23h 3m Buy It Now for only: $19.99 Buy It Now | Add to watch list

TRIDONIC PCA 2 x 54w HO T5 DIGITAL DIMMABLE BALLAST DSI ECO SWITCH DIM SMART $25.20 Time Remaining: 23d 7h 46m Buy It Now for only: $25.20 Buy It Now | Add to watch list

Box of 10 GE432 MVPS N 75382 4 Lamp Electronic Ballast $94.99 Time Remaining: 29d 4h 36m Buy It Now for only: $94.99 Buy It Now | Add to watch list

Powerlighting Rapid Start Dimming Ballast 8G5007W $120.00 Time Remaining: 11d 4h Buy It Now for only: $120.00 Buy It Now | Add to watch list

5 Advance RZT 2S54 Electronic Dimmable Ballast F54T5 dimming ballast $250.00 Time Remaining: 10d 9h 5m Buy It Now for only: $250.00 Buy It Now | Add to watch list

NEW Lutron Hi Lume Compact SE Electronic Dimming Ballast FDB T432 120 1 S $50.00 Time Remaining: 4d 12h 33m Buy It Now for only: $50.00 Buy It Now | Add to watch list

LUTRON HI LUME BALLAST FDB 2427 120 1 $65.00 Time Remaining: 29d 6h 22m Buy It Now for only: $65.00 Buy It Now | Add to watch list

Advance VEZ 2S32 SC 277V 2 Lamp T8 Mark X Fluorescecnt Dimming Ballast Dimmable $50.00 Time Remaining: 9d 23h 31m Buy It Now for only: $50.00 Buy It Now | Add to watch list

Lutron T817 120 2 Eco 10 Electronic Fluorescent Dimming Ballast 17W T8 $99.99 Time Remaining: 29d 8h 22m Buy It Now for only: $99.99 Buy It Now | Add to watch list

Sylvania 49674 QT2X54 277PHO DIMMING Ballast 277 Volt Quicktronic case of 20 $1,150.00 Time Remaining: 29d 9h 56m Buy It Now for only: $1,150.00 Buy It Now | Add to watch list

Advance REZ2S54 Dimmable Ballast Mark 10 Powerline F54T5 dimming ballast $130.99 Time Remaining: 10d 9h 3m Buy It Now for only: $130.99 Buy It Now | Add to watch list

Lutron Compact SE Fluorescent Dimming Ballast T4 4 Pin 32W 120V FDB T432 120 1 S $17.99 Time Remaining: 2d 5h 45m Bid now | Add to watch list

Lutron EC5T524JUNV1 Fluorescent Dimming Ballast NEW $5.99 Time Remaining: 14d 2h 20m Buy It Now for only: $5.99 Buy It Now | Add to watch list

Lightolier Recessed Downlight 1101FD2642MX1 Fluorescent w Dimming Ballast 120V $119.00 Time Remaining: 19d 4h 43m Buy It Now for only: $119.00 Buy It Now | Add to watch list

Lutron FDB T432 120 1 S Compact SE Ballast $30.00 Time Remaining: 13d 22h 39m Buy It Now for only: $30.00 Buy It Now | Add to watch list

LUTRON HL3 T426 1201 S DIMMING CFL 26W BALLAST $99.99 Time Remaining: 10d 7h 8m Buy It Now for only: $99.99 Buy It Now | Add to watch list

PHILLIPS ADVANCE IZT 2S26 M5 BS MARK 7 0 10V BALLAST $25.00 Time Remaining: 1d 27m Buy It Now for only: $25.00 Buy It Now | Add to watch list

GE Magnetic Rapid Start Ballast 89714 GEM140HRS120DIY $8.99 Time Remaining: 4d 8h 33m Buy It Now for only: $8.99 Buy It Now | Add to watch list

ADVANCE ITZ 2S26 M5 BS 120V 277 MARK 7 DIMMABLE 0 10V $19.00 Time Remaining: 8d 10h 50m Buy It Now for only: $19.00 Buy It Now | Add to watch list

LUTRON COMPACT SE DIMMING BALLAST FDB T432 277 1 S USE 2 32W T4 PIN LAMPS $30.00 Time Remaining: 27d 23h 16m Buy It Now for only: $30.00 Buy It Now | Add to watch list

4LZ24 HI LUME ELECTRONIC FLUORESCENT DIMMING BALLAST 030AMP NEW $18.99 Time Remaining: 11d 43m Buy It Now for only: $18.99 Buy It Now | Add to watch list

Metrolight Metal Halide 39watt DIMMING Ballast $30.00 Time Remaining: 17d 6h 13m Buy It Now for only: $30.00 Buy It Now | Add to watch list

LUTRON 2W T832 120 2 TU WIRE ELECTRONIC FLUORESCENT DIMMING BALLAST 120V 53343 $34.99 Time Remaining: 19d 12h 16m Buy It Now for only: $34.99 Buy It Now | Add to watch list

ElectraLED CR 3600D 24VDC 36A Dimming LED Power Supply 3 $33.99 Time Remaining: 5d 5h 55m Buy It Now for only: $33.99 Buy It Now | Add to watch list

Hubbell Dual Lite Lampak Emergency Fluorescent Lighting Ballast UFO 3AW SDC NiB $67.49 Time Remaining: 22d 4h 40m Buy It Now for only: $67.49 Buy It Now | Add to watch list

Lutron FDB T554 277 1 T5 54W 1 Lamp Dimming Ballast 1 $50.99 Time Remaining: 23d 2h 54m Buy It Now for only: $50.99 Buy It Now | Add to watch list

LOT OF LIGHTOLIER RECESSED COMPACT FLORESCENT DOWNLIGHTS WITH TRIMS $99.00 (1 Bid) Time Remaining: 1d 4h 6m Bid now | Add to watch list

SensorSwitch Brand High Bay Motion Sensor for Warehouse Lighting $50.00 Time Remaining: 7d 8h 33m Buy It Now for only: $50.00 Buy It Now | Add to watch list

Hi Lume LED Light 1 Dimming Driver Ballast 120 277V Lutron L3D25105AUNV1S $39.99 Time Remaining: 17d 10h 29m Buy It Now for only: $39.99 Buy It Now | Add to watch list

GE 232MVPS H V03 Electronic Dimming Ballast $49.95 Time Remaining: 17d 10h 1m Buy It Now for only: $49.95 Buy It Now | Add to watch list

CON TECH CTL15042N P WHITE TRACK WALL WASH FLUORESCENT $94.95 Time Remaining: 22d 8h 2m Buy It Now for only: $94.95 Buy It Now | Add to watch list

Advance VEZ 132 SC 277V Mark X 1 Lamp T8 Fluorescent Dimming Ballast Dimmable $50.00 Time Remaining: 26d 5h 28m Buy It Now for only: $50.00 Buy It Now | Add to watch list

one B232SR120V5 Universal triad Rapid Start Dimming Ballast Electronic $49.95 Time Remaining: 17d 10h 3m Buy It Now for only: $49.95 Buy It Now | Add to watch list

EcoSystem EC3DT442KU1 5 Electronic Fluorescent Dimming Ballast For 42W T4 4 Pin $67.99 Time Remaining: 17d 4h 2m Buy It Now for only: $67.99 Buy It Now | Add to watch list

cooper lighting recessed light w lutron hi lume ballast $22.97 Time Remaining: 19d 7h 44m Buy It Now for only: $22.97 Buy It Now | Add to watch list

Advance VEZ 1T42 M2 LD Mark 10 Powerline Quad Triple Lamp 277V Dimming Ballast $30.00 Time Remaining: 12d 2h 22m Buy It Now for only: $30.00 Buy It Now | Add to watch list

1 New GB2T832DHB U Green Ballast with Auto Dimming Photo Cell 120 277V T8 $32.95 Time Remaining: 25d 10h 21m Buy It Now for only: $32.95 Buy It Now | Add to watch list

2 New Philips FBP520LT Fluorescent Emergency Ballsts $44.95 Time Remaining: 6d 6h 17m Buy It Now for only: $44.95 Buy It Now | Add to watch list

Tridonic Atco Fluorescent Electronic Digital Ballast TCD PRO Lamp 1x18W 18watt $15.72 Time Remaining: 1d 2h 40m Buy It Now for only: $15.72 Buy It Now | Add to watch list

1 mark VII VZT 2S32 dimming ballast 277V $46.99 Time Remaining: 10d 3h 34m Buy It Now for only: $46.99 Buy It Now | Add to watch list

Mark 10 Powerline Electronic Dimming $30.00 Time Remaining: 4d 23h 57m Buy It Now for only: $80.00 Buy It Now | Bid now | Add to watch list

Lutron Dimming Ballast FDB T432 120 1 S Lot of two $39.99 Time Remaining: 4d 32m Buy It Now for only: $39.99 Buy It Now | Add to watch list

Sylvania QTP 2x28T5 UNV 120 277V 2 L Dimming T5 Ballast $42.49 Time Remaining: 29d 7h 44m Buy It Now for only: $42.49 Buy It Now | Add to watch list

NEW T5 DIMMING BALLAST LUTRON H3DT528CUNV110 HI LUME 3D $99.00 Time Remaining: 20d 2h 21m Buy It Now for only: $99.00 Buy It Now | Add to watch list

Induction Lighting Shoebox Fixture 200W eBay $450.00 Time Remaining: 26d 3h Buy It Now for only: $450.00 Buy It Now | Add to watch list

Philips ECD 277 2 32T Dimmable Dimming Ballast 2x F32T8 $49.99 Time Remaining: 11d 8h 46m Buy It Now for only: $49.99 Buy It Now | Add to watch list

Sylvania QTP 2x28T5 UNV DIM TCL 120 277V 2 Lamp T5 Electronic Dimming Ballast $80.74 Time Remaining: 13d 2h 1m Buy It Now for only: $80.74 Buy It Now | Add to watch list

LUTRON SLID TO OFF FLUORESCENT DIMMER SWITCH NTF 10 277 BE NEW IN BOX BEIGE $21.99 Time Remaining: 25d 8h 4m Buy It Now for only: $21.99 Buy It Now | Add to watch list

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Lutron Hi Lume Dimming Ballast FDB T432 277 1 S 32W T4 4 Pin Rapid Start $50.00 Time Remaining: 5d 6h 7m Buy It Now for only: $50.00 Buy It Now | Add to watch list

Lutron ECO T528 277 1 28W T5 Lamp 277V Dimming Ballast $42.49 Time Remaining: 22d 5h 52m Buy It Now for only: $42.49 Buy It Now | Add to watch list

Universal B128PUNVSV3 D Dimming Ballast For 1 F21 F28T5 $63.74 Time Remaining: 23d 7h 31m Buy It Now for only: $63.74 Buy It Now | Add to watch list

Universal ES 2 1 CFQ 13 UNV GT DIM D Dimming Ballast $50.99 Time Remaining: 15d 9h 21m Buy It Now for only: $50.99 Buy It Now | Add to watch list

Universal DCL B232PULV50H A Dimming Ballast 2 Lamp F32T8 120V To 277V TWO $56.09 Time Remaining: 15d 8h 58m Buy It Now for only: $56.09 Buy It Now | Add to watch list

Lightolier Self Diagnostic Emergency Lighting Ballast FBP50ST N NIB $9.99 Time Remaining: 6d 3h 37m Bid now | Add to watch list

2 New EC5T528JUNV1 Lutron EcoSystem Dimming Ballasts 120 277V for 1 28W T5 Lamp $38.45 Time Remaining: 24d 4h 27m Buy It Now for only: $38.45 Buy It Now | Add to watch list

NEW LUTRON H3DT528CUNV210 FLUORESCENT BALLAST F28T5 $129.99 Time Remaining: 5d 3h 58m Buy It Now for only: $129.99 Buy It Now | Add to watch list

Atlite Portfolio Triple Compact Fluorescent Rough In $24.99 Time Remaining: 2d 9h 22m Buy It Now for only: $24.99 Buy It Now | Add to watch list

Hi Lume FDB CF26 120 1 B BALLAST $19.99 Time Remaining: 22d 4h 3m Buy It Now for only: $19.99 Buy It Now | Add to watch list

Lot of 5 Lutron EHDT832CU210 EcoSystem H Series Fluorescent Dimming Ballast NEW $49.99 Time Remaining: 9d 1h 20m Buy It Now for only: $49.99 Buy It Now | Add to watch list

10ct GE 97635 42W CFL bulbs 4 Pin Base F42TBX 835 A ECO Triple GX24 q4 $89.99 Time Remaining: 16d 16h 1m Buy It Now for only: $89.99 Buy It Now | Add to watch list

Axis AX432B120 277 F32T8 F32T8 U F31 T8U Dimming Ballast 120 To 277V $46.74 Time Remaining: 19d 7h 27m Buy It Now for only: $46.74 Buy It Now | Add to watch list

Advance VEZ 1TTS40 1 FT40W L 277V Dimming Ballast 1 $29.74 Time Remaining: 4d 11h 3m Buy It Now for only: $29.74 Buy It Now | Add to watch list

ELECTRONIC DIMMING BALLAST 1 42W CFL 4 PIN 277V ADV $19.99 Time Remaining: 27d 19m Buy It Now for only: $19.99 Buy It Now | Add to watch list

GE LFL UltraMax GE232MAX90 S60 Dimming Ballast $35.00 Time Remaining: 17d 9h 4m Buy It Now for only: $35.00 Buy It Now | Add to watch list

GE UltraMax T8 GE432MAX L ULTRA qty 10 NEW 71725 $149.00 Time Remaining: 26d 6h 5m Buy It Now for only: $149.00 Buy It Now | Add to watch list

NEW 24V DC 54W T5 INPUT ELECTRONIC HIGH EFFICIENCY FLUORESCENT DIMMING BALLAST $99.00 Time Remaining: 2d 33m Buy It Now for only: $99.00 Buy It Now | Add to watch list

Universal ES 2 1 CFQ 18 UNV HT DIM10 DIMMING BALLAST $42.49 Time Remaining: 15d 8h 15m Buy It Now for only: $42.49 Buy It Now | Add to watch list

More Great Information on Dimming Ballast:

Dimmable Electronic Ballast by ballast123

Fluorescent lamps are controlled by an electronic ballast that provides the necessary ignition voltage for the discharge that provides the illumination. Since a minimum voltage must be provided for the ignition to start, providing a means for dimming the voltage is difficult, as simply varying the supply voltage (which would be effective with say a conventional filament light bulb) cannot be used without jeopardising the ignition voltage.

Notwithstanding this difficulty providing a dimmable ballast is desirable for a number of reasons, including the desire of energy efficiency, and the desire to create a pleasant working environment. A range of techniques have been developed to enable a dimmable Fluorescent Lamp to be created. For example dimming may be provided by controlling the switching frequency so that the impedance of the limiting inductor in the ballast can be varied so as to control the current into the lamp. Another way of providing dimming control is to control the duty-cycle of the switching devices (switching at constant frequency) so that the average applied voltage and current in the lamp can be varied.

Moreover, of particular importance in the design of Electronic Ballasts are the requirements for high power factor, low total harmonic distortion, low electromagnetic interference (EMI), low lamp current crest factor, and low flickering. In order to comply with the requirements of certain international standard (for example IEC1000-3-2 Class C appliances), commercially available products usually consist of two cascaded stages for the input power factor correction (PFC) and output high-frequency inversion. A regulated dc voltage, for example 400V, inter-links the two stages. Some specialized integrated circuits have been developed for this particular application to simplify the circuit schematics. For the input stage, boost- and flyback-type pre-regulators are the most popular choices. For the output stage, either a voltage-fed or current-fed inverter is usually chosen. A resonant tank circuit is used because of its distinct advantages of near-sinusoidal lamp current and high voltage generation during the ignition period. The dimming operation is based on adjusting the switching frequency of the inverter so that the reactance of the series inductor can be varied and thus the lamp power can be controlled.

In order to simplify the overall circuitry and reduce the manufacturing cost, many passive PFC circuits and single-stage electronic ballast with dimming features have recently been reported. Some of them minimize the circuit structure by integrating the switch in the PFC into one of the switches in the inverter. However, their structural elegance is offset by various problems, such as high lamp current crest factor, asymmetrical lamp voltage and current waveforms, high dc link voltage at low luminous level, high component stresses, and narrow dimming range. In order to achieve a desired dimming range and soft-switching of the switches in the inverter, the switching frequency of the inverter has to be varied in a single-stage system. This can result in lamp current and voltage waveform distortion. The dc link voltage has to be set to a much higher value, which can be two to three times higher than the rated value of the supply voltage for reducing the above problem. This aspect is particularly problematic for countries having high-voltage mains supply, such as 220V in Hong Kong and the UK, resulting in the requirement for a very high voltage dc link capacitor for stabilizing the inverter input.

Furthermore, existing dimmable ballasts are generally four-wire systems--two (conventional live and neutral) for the ac supply mains input and the other two connecting to a variable dc voltage input (for example 0-10V) or variable resistor for dimming control. Recently, a ballast that can provide a dimming features using a TRIAC-based dimmer at the supply mains has been proposed in "Phase-controlled dimmable electronic ballast for fluorescent lamps" of W. Ki, J. Shi, E. Yau, P. Mok, and J. Sin, in Proc. IEEE Power Electron Spec. conf. 1999 pp1121-1124. However, the dimmer has to be modified so that the actual firing angle is varied within few degrees of angle only. It has been proposed in "TRIAC dimmable integrated compact fluorescent lamp" of J.Janczak in J. of Illuminating Eng. Soc., pp144-151 1998 to use an ordinary dimmer to adjust the luminous level of compact fluorescent lamps. The dc link voltage is kept at a relatively constant value throughout the dimming range.Again, changing the switching frequency of the inverter varies the outputluminous level, and the dimming range is relatively narrow.

An electronic ballast which is able to provide effective dimming control of a fluorescent lube (either of tubular or compact type) is provided by the described circuits. A circuit which is able to provide a substantially transformed dimming control over a particularly wide range is provided. It is found that this linearised circuit reduces the flickering and dark ring effects in the low dimming and low power regions of operation, which is advantageous for the lifetime of a fluorescent lamp.

Ningbo Zhengjia Electric Appliance Co., Ltd is a professional R & D manufacturer and exporter of electronic ballast for fluorescent lamps(FL) and Compact Fluorescent Lamps(PL).

Article Source: http://www.earticlesonline.com/Article/Dimmable-electronic-ballast/1036956

Daylight Harvesting Ballasts and their costs?

So I am working on a project for one of my classes and we are asked to propose a more energy efficient lighting package for a building. One of the things I was considering was daylight harvesting because the rooms are full of windows and receive a lot of daylight. The only problem is I have no idea what the specs are for today's technology. How much would it cost for an A-B switch daylight harvesting ballast? How much for a dimming ballast? Any help or suggestions would be appreciated. Thanks.

Modern power electronics has pretty much replaced the use of ballasts in fluorescent lights. It's only those old tubes where there's two straight tubes in a light fixture that still has ballasts (you can tell by listening for that 60 hertz whine). The ballasts are only there to get the tube to light up and won't be able to dim a fluorescent light.

Almost two decades ago, my company asked employees for energy saving ideas that would save the company money and offered a reward incentive. I proposed turning off lights during the day when natural light was sufficient. They didn't implement the idea because the lease agreement was such that the property management company covered the energy costs up to a certain number of watts per square foot leased and that was more than enough to cover the lighting costs hence our management didn't think there would be any savings. In fact there would've been some savings because we had the computer center in the same building so the power allowance would've just helped run the computer room if we conserved on the lights, our management was just too dense to realize that.