A weapon light is an important tool. After all, criminals are crepuscular.
But not every holster works with a weapon light. That's why we have to specially make "Light-Compatible" Holsters (whether IWB holsters like the Raptor, Sidecar, or OWB like the Ragnarok).
Our Light-Compatible holsters are molded around the weapon light so that particular light needs to be attached for proper retention.
With a Light-Compatible holster, you have the same belt clip/attachment options as a regular holster.
If you regularly puts on and takes off their weapon light, you'll need two holsters: one Light-Compatible and one regular holster.
As you can see in the picture below, on the Raptor Appendix Holster, (a regular, non-light-compatible holster), there's no room to fit a light onto the bottom of the gun and still have it fit in the holster.
Left: The Black Holster is a Sig P365XL + Streamlight TLR-6 Light-Compatible Raptor
Right: The Carbon Fiber Pattern Holster is a P365 XL Raptor Appendix Holster