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2. Fluorescent-lamp formats - Wikipedia

   en.wikipedia.org/wiki/Fluorescent-lamp_formats

   Ballast-swap replacement for 3 ft T12 30 W T8: 1.0, 25: 4: 32 F32T8: Ballast-swap replacement for 4 ft T12 40 W T8: 1.0, 25: 8: 59 F96T8: Ballast-swap replacement for 8 ft T12 75 W single-pin T12: 1.5, 38: 4 "25" F40UTSL Retrofit replacement for 4 ft T12 40 W on underpowered residential-grade rapid start magnetic ballasts. These are F40CW lamps ...

3. Fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamp

   A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow.

4. Compact fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Compact_fluorescent_lamp

   A compact fluorescent lamp (CFL), also called compact fluorescent light, energy-saving light and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent light bulb; some types fit into light fixtures designed for incandescent bulbs.

5. Electrical ballast - Wikipedia

   en.wikipedia.org/wiki/Electrical_ballast

   [1] [3] To prevent this, fluorescent tubes are connected to the power line through a ballast. The ballast adds positive impedance (AC resistance) to the circuit to counteract the negative resistance of the tube, limiting the current. [1] Several American magnetic ballasts for fluorescent lamps. The top is a rapid start series autoregulator ...

6. High-intensity discharge lamp - Wikipedia

   en.wikipedia.org/wiki/High-intensity_discharge_lamp

   Ballasts for discharge lamps. Like fluorescent lamps, HID lamps require a ballast to start and maintain their arcs. The method used to initially strike the arc varies: mercury-vapor lamps and some metal-halide lamps are usually started using a third electrode near one of the main electrodes, while other lamp styles are usually started using ...

7. Bi-pin lamp base - Wikipedia

   en.wikipedia.org/wiki/Bi-pin_lamp_base

   The suffix after the G indicates the pin spread; the G dates to the use of Glass for the original bulbs. GU usually also indicates that the lamp provides a mechanism for physical support by the luminaire: in some cases, each pin has a short section of larger diameter at the end (sometimes described as a "peg" rather than a "pin" [2]); the socket allows the bulb to lock into place by twisting ...

8. List of automotive light bulb types - Wikipedia

   en.wikipedia.org/wiki/List_of_automotive_light...

   Group 3 (For replacement purposes only) Category Cap (Base) Filaments Nominal power Comments Image C21W SV8.5 1 12 V: 21 W Old designation: C15, for reversing lamp only H2 X511 1 12 V / 55 W ECE nominal luminous flux: 1800lm ±15% Deleted from Reg 37 H14 2 12 V: 60 / 55 W P38t Japan ECE nominal luminous flux: 1,750 / 1,150 lm ±15% P19W PGU20-1 1

9. Light fixture - Wikipedia

   en.wikipedia.org/wiki/Light_fixture

   Fluorescent; Fluorescent lamp, compact fluorescent lamp (CFL), Induction lamp, blacklight. Fuel lamps; Betty lamp, butter lamp, carbide lamp, gas lighting, kerosene lamp, oil lamp, rush light, torch, candle, Limelight, gas mantle Safety lamps: Davy lamp and Geordie lamp. Gas-discharge lamp and high-intensity discharge lamp (HID)