Are all 4-pin light bulbs the same?
4-pin plug-in CFL bulbs follow the same designation as other pin base with a “q” following the pin spacing number, which stands for quadruple, then either a 1, 2, or 3. This final number indicates the base’s dowel position. You may always notice some CFL bases have an “X” following the “G” in their designation.
What is the difference between 2 pin and 4-pin CFL?
2-pin CFLs can only be used with magnetic ballasts, and 4-pin CFLs only with electronic ballasts. Many of these bases feature a stabilizing block that helps keep the bulb secure in the fixture once installed.
How do I identify a CFL bulb?
Compact Fluorescent Lamp Identification
- T – twin parallel tubes.
- Q – four tubes in a quad formation.
- TR – triple tube (including three twin tubes in a delta formation or three tubes in an arch) see footnote below.
- S – square shaped.
- M – a combination of tubes (multiple) not covered by any of the above shape designators.
How do you test a 4 pin fluorescent bulb?
Set a multimeter to the ohm (Omega symbol) setting, then touch one tester probe to each of the pins at the end of the bulb. If the tester shows a reading between 0.5 and 1.2 ohms, the bulb has continuity. Repeat the test at the other end of the bulb.
Can CFL bulbs be used upside down?
CFLs can be installed base up. Although there may be a slight difference in lumen output depending whether the bulb is base-up or down, the difference is often imperceptible.
What are the different sizes of plug-in CFL light bulbs?
18-Watt 4-pin plug-in CFL bulbs have G24q-2, GX24q-2, and 2G11 bases. 21-Watt plug-in CFL light bulbs are equipped with G24q-3 and GR10Q bases. 24-Watt plug-in CFLs have 2G11 bases. 25-Watt 4-pin CFLs are equipped with 2G11 bases.
What do the numbers mean on CFL bulbs?
The base type starts with “G” or “GX” followed by a number that indicates the spacing between the pins (measured in millimeters): 7-Watt 4-pin plug-in CFLs are equipped with a 2G7 base. 9-Watt plug-in CFL light bulbs have a 2G7 base. 13-Watt plug-in CFL bulbs are equipped with 2GX7, G24q-1, and GX24q-1 bases.
What is the base size of a 7 watt light bulb?
7-Watt 4-pin plug-in CFLs are equipped with a 2G7 base. 9-Watt plug-in CFL light bulbs have a 2G7 base. 13-Watt plug-in CFL bulbs are equipped with 2GX7, G24q-1, and GX24q-1 bases. 14-Watt plug-in CFL lamps have a G24q-2 base. 18-Watt 4-pin plug-in CFL bulbs have G24q-2, GX24q-2, and 2G11 bases.
What kind of bulb can I use with a 4-pin ballast?
Available in twin-tube, quad-tube, and spiral shapes, these lamps can only be used with electronic ballasts specially designed for 4-pin lamps. Plug-in CFLs come in several color temperatures ranging from 2700 Kelvin, which produces a warm light similar to incandescents, to a full spectrum 6500 Kelvin that simulates daylight.