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2. Fluorescent-lamp formats - Wikipedia

   en.wikipedia.org/wiki/Fluorescent-lamp_formats

   Fluorescent tube diameter designation comparison Designation Tube diameter Extra (in) (mm) Socket Notes T2 1 ⁄ 4 approx. 7 WP4.5×8.5d Osram's Fluorescent Miniature (FM) tubes; Sylvania Luxline Slim T2 Linear; T4 1 ⁄ 2: 12.7 G5 bi-pin: Slim lamps. Power ratings and lengths not standardized (and not the same) between different manufacturers ...

3. Fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamp

   The efficacy of fluorescent tubes ranges from about 16 lumens per watt for a 4 watt tube with an ordinary ballast to over 100 lumens per watt [51] with a modern electronic ballast, commonly averaging 50 to 67 lm/W overall. [52] Ballast loss can be about 25% of the lamp power with magnetic ballasts, and around 10% with electronic ballasts.

4. Compact fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Compact_fluorescent_lamp

   The lamp used a folded T4 tube, ... [12] In 1985, Osram started selling ... Voltage and current for a 120 V 60 Hz 30-watt compact fluorescent lamp.

5. Bi-pin lamp base - Wikipedia

   en.wikipedia.org/wiki/Bi-pin_lamp_base

   Twist-lock 120/230-volt MR16 halogen lighting of 35/50 watt, differs from GU10 by use of a dichroic reflector. GZ10 fixtures can use GU10 bulbs, but not vice versa. G12: 7004-63-2: 12.0 mm: 2.35 mm Used in theatre and single-end metal halide lamps. G13: 7004-51-10: 0.50 in (12.7 mm) 0.093 in (2.35 mm) Common T8, T10 and T12 fluorescent tubes. GX16d

6. Lightbulb socket - Wikipedia

   en.wikipedia.org/wiki/Lightbulb_socket

   Fluorescent Linear Tube Light bulbs are measured in 1 ⁄ 8 of inches. So a T12 fluorescent is 12 ⁄ 8 of an inch in diameter or 12 ⁄ 8 = 1.50" T4 – 4/8 or 0.500 ...

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