Banggood's Astrolux/BLF lighted tailcap

Saw this today at Banggood. Does anyone know what flashlights this would work with? It is listed as new so maybe different from the X5/X6 version they sell.

2LED 17mm DIY Lighting Switch Set For Astrolux/BLF LED Flashlight (1236019)

It depends on the resistors you use, too low can mess up the OTC on many drivers

You have to add a bleeder resistor on the driver between positive battery and negative ground ring

Yup, depends on whether you mean “physically fits into” or “operates properly”. Like Lexel said, most drivers are going to need a bleeder to operate properly. The X5/X6 driver is the only “factory” driver I can think of that comes with a bleeder (because it was made with illuminated tailcaps in mind). It will physically fit into many, many more lights (eg, most Convoys)… but you really want that bleeder.