My favorite light is a corded can light from DiveRite, NLA. It started out as 500 lumen and I sent it back and they upgraded to 750 lumen. Now, you say, 750 lumen, what good is that! Well, it also throws a very wide evenly lit beam that can light an entire reef at night, like a super moon but the light is soft so it does not burn the eyes out of critteres. Then using knowledge gained on the Flashlight Forum (there is or was a forum for everything) I bumped it up to about 1,000 lumen. And it will run an entire trip on eight AA batteries. And as such lights go it is very small and lightweight. I sure wish they would bring it back. Oh, I forgot, it can be switched over to a single unit configuration with no cord.
James