Are GX24Q-3 bulbs compatible with G24Q-3 bases and vice versa? Can a GX24Q-3 bulb be safely powered by a G24Q-3 base? Can a G24Q-3 bulb be safely powered by a GX24Q-3 base?
EDIT: If not, then can a 26-watt GX24Q-3 CFL replace a same-watt G24Q-3 CFL in a G24Q-3 ballast? I have a G24Q-3 ballast that has always used 26-watt G24Q-3 CFL. When the last CFL died, I replaced it with, and was able to fit, a 26-watt GX24Q-3 CFL in the ballast. But I get only one flicker (and nothing else) each time when powering on, so is the GX24Q-3 bulb incompatible or just a bad bulb?
Adding to the confusion, this page markets an LED bulb that’s “Compatible with only base G24q-3/GX24q”. I didn’t use that LED; my test used a CFL of a different brand, which doesn’t indicate whether it’s compatible with G24Q-3 ballasts. This other site’s search filter consolidates G24Q-3 & GX24Q-3.
The notches of the G24Q-3 and GX24Q-3 bulbs are located at the same 1- and 7-o’clock positions. The bulbs are different in their bezel above the notched section: a hexagon bezel for GX24Q-3 bulb and a rounded square bezel for the G24Q-3 bulb. I now see from some answers’ diagrams that the G24Q-3 bulb has a longer central peg (a.k.a. stabilizing block) than the GX24Q-3 bulb. Because my G24Q-3 ballast’s socket is deep enough to fit the G24Q-3 bulb’s stabilizing block, the shorter block on the GX24Q-3 doesn’t cause any fit issues. The plastic holder section of my G24Q-3 ballast goes only up to the notched cross section of the G24Q-3 bulb, so the hexagonal bezel of the GX24Q-3 bulb doesn’t cause any fit issues either. Both G24Q-3 and GX24Q-3 bulbs can fit in a G24Q-3 ballast. If the socket on a GX24Q-3 ballast is only as deep as its own bulb type’s stabilizing block, then G24Q-3 bulbs can’t fit in GX24Q-3 ballasts. Is this length difference designed to make GX24Q-3 bulbs backwards-compatible with G24Q-3 ballasts and prevent G24Q-3 bulbs from being forwards-compatible with GX24Q-3 ballasts?