[DonRotolo]

If your flashlight CAN be aimed into the opposing alliance's eyes, during match play it will do that, and your friendly inspectors will ask you to make changes. So wire the voltage converter to a spike, on a momentary button, so it shines only while actively aiming.

Green LED rings tend to be less bright, from experience the spots fade a lot sooner. But the same idea as above applies.

If you're not sure if it is bright or not, look into it for a second and then decide. *Caution* you can hurt yourself!