I have a few lights and by far my favorite one I got from amazon. Really bright and clips off nicely on a d ring.

ORCATORCH D520 Diving Flashlight 1000 Lumens Scuba Diving Light Submarine Light Underwater 150m Scuba Safety Lights

https://www.amazon.com/dp/B01LGM87MS/ref=cm_sw_r_cp_api_i_yYDkDbA7QA1RD