CFL ni Caps

Different CFL-Ni Lamp Caps Bases

The NEMA generic designation system for pin-based compact fluorescent lamps consists of four parts:

CF + Shape + Wattage / Abbreviated Base Designation

•  CF:

The prefix "CF" is used for all types of compact fluorescent lamps that comply with the American National Standards Institute definition..

• Shape:

The "Shape" designator is chosen from the following:

1. T - twin parallel tubes
2. Q - four tubes in a quad formation
3. TR - triple tube (including three twin tubes in a delta formation or three tubes in an arch)
4. S - square shape.
5. M - a combination of tubes (multiple) not covered by any of the above shape designators

• The "Wattage" is the nominal wattage, followed by "W".
•   The "Abbreviated Base Designation" after the "/"separator:

Is the IEC/ANSI designation which includes the number of pins, but excludes any keyway information. The base designation, which can be determined from lamp catalogs, is essential to differentiate between lamps of the same wattage, but which have different pin configurations (see base reference below).

EXAMPLES:

-       9 watt twin tube with G23 base                                            à CFT9W/G23

-       26 watt quad tube with 2 pin G24 base                              àCFQ26W/ G24d

-       26 watt quad tube with 4 pin G24 base                              àCFQ26W/G24q

-       32 watt triple tube with 4 pin G24 base, >80CRI, 3500K  àCFTR32W/G24q/835

there are two main types of G24 series   G24d and G24q. The G24d series have two pins which are 24mm apart and work with magnetic ballasts.

The G24q series have four pins and work with electronic ballast. The G24d-1 has a nib in the centre, and is usually 10W or  lower. The G24d-2 has a nib  to the left, and is usually 18W. The G24d-3 has a nib to the right, and is usually 26W..