This is 4P Short 15.5mm GX24Q Base, NOT FOR 2P;NOT FOR DIY!!! NEED REWIRING/BYPASS/ REMOVE the ballast,the Ballast has a black and white wire on the input side, two red and two blue output side. To bypass this ballast,cut all the Input and output wires,and connect 2 Red to Black,2 Blue to White wire.
with Base depth 15.5mm/0.6 inches. Short version 4-pins: Q series has a shorter tip than D series,Suitable for G24Q-1, G24Q-2.G24Q-3, GX24q-1,GX24q-2,GX24q-3 socket;Works for 4-Pin CFL with G24q-1 Base:10w 13w Quad Tube; GX24q-1 Base:10w 13w Triple Tube;G24q-2 Base:18w Quad Tube;GX24q-2 Base:18w Triple Tube;G24q-3 Base:26w 32w Quad Tube;GX24q-3 Base:26w 32w Triple Tube; If your socket is 2P, buy: https://www.amazon.com/dp/B017T1UJEE
THE BALLAST IN YOUR FIXTURE MUST BE REMOVED OR BYPASSED FOR THESE ADAPTERS TO FUNCTION PROPERLY. CONSULT AN ELECTRICIAN IF YOU ARE UNSURE. DO NOT OPERATE A LED BULB WITH A BALLAST IN THE FIXTURE, DOING SO WILL LIKELY DAMAGE THE BULB.
All pin-based CFL, like GX24Q G24 GX23 G23 are lamp-ballast separated, but all screw-in E26 E27 are lamp-ballast integrated. ballast is a must to start a high voltage(600V-1500V 1ms) to light up the CFL, but it is dangerous for LED Lamp. Because LED Lamp are built with LEDs and Driver which is transforming the 100-240V AC to DC for LEDs. So the LED Driver input should be 100V-240V or 85-265V, so 600-1500V will be too high, and easily destroy the led lamp.
There are LED bulbs with Driver compatible with the ballast,which you may find work without bypass ballast. BUT no LED Driver can be compatible with all ballast.Ballast is there consuming power,cause high temperature which will damage LED Bulb, So the Professional doing is bypass it. All pin-based CFL is ballast-lamp separated, E26/E27 bulbs are self-ballast.