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2. Fluorescent-lamp formats - Wikipedia

   en.wikipedia.org/wiki/Fluorescent-lamp_formats

   In the 1970s, Thorn Lighting introduced an energy-saving 8 ft retrofit tube in Europe. Designed to run on the existing 125 W (240 V) series ballast but with a different gas fill and operating voltage, the tube operated at only 100 W. Increased efficiency meant that the tube produced only 9% lumen reduction for a 20% power reduction. [ 7 ]

3. Fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamp

   T12 fluorescent tubes. The first two are rapid start, (for "tombstone" and socket holders respectively) while the third is an instant-start lamp. The instant-start has a characteristic, rounded, single pin, for plugging into the spring-loaded socket holders. Instant start fluorescent tubes were invented in 1944. Instant start simply uses a high ...

4. 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 in (12.7 mm) in diameter

5. 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 ...

6. SN 441011 - Wikipedia

   en.wikipedia.org/wiki/SN_441011

   Pre-2009 T12 plug and pre-2017 T12 socket: fingers can touch dangerous voltage. Originally, T12 plugs and sockets (the most common in domestic use) posed a safety concern. As the T12 sockets are flat and as the pins of the plugs did not have any insulation, the electrical contact was established in the pins even though the latter remained ...

7. Here's what to expect when Congress convenes to certify the ...

   www.aol.com/heres-expect-congress-convenes...

   Congress is gathering for a joint session to certify the results of the 2024 election, the final step before President-elect Donald Trump's inauguration on Jan. 20, after some major changes to ...