The GX24Q is a 4-pin cap with 24mm spacing between opposite pin centres, and comes in six different forms: GX24Q-1, GX24Q-2, GX24Q-3, GX24Q-4, GX24Q-5, and GX24Q-6. Although the pin formation is consistent amongst all of them, their design uses a plastic guide that will only match the corresponding female socket. Therefore, the six formats cannot be used interchangeably.
GX24Q-1, GX24Q-2, GX24Q-3, GX24Q-4, GX24Q-5, GX24Q-6.
4-Pin Triple Tube CFL (Triple Biax).