Safe Use of a Weapon-Mounted Light

One advantage of newer, more powerful WMLs is that there's enough bounce and spill to make them useful for searching via reflected illumination. The linked article does a good job of explaining this.

A WML is an integral part of the weapon system, providing light in critical low-light situations without hindering the ability to shoot. It frees up a hand for other tasks and ensures the light is always aligned with the weapon. While it complements a flashlight, it doesn’t replace it – your handheld light is your primary illumination tool. If you’re not justified in drawing your gun, you’re not justified in pointing a WML.

When searching with a WML is warranted, baseboard and umbrella lighting techniques can help avoid muzzling non-threats by illuminating an area without aiming the gun directly at it. These techniques also offer additional advantages.

Go and RTWT. It's worthwhile.

We've come a long way since this old 300 lumen TLR-1s, but even it can be used on baseboards and ceilings.