underwater video camera lighting question

[Junzhe Davy Zou]

Hi experts!

I recently finished building an underwater camera housing unit for my sony handycam. It is made from a waterproof ammo box, and a piece of plexiglass and some marine glue. (yes, there is that guy who did it and put it on youtube. it's where i got my idea). It has passed the bathtub test and today I will take it to a pool in my area and test its waterproof-ness by taking it to 45 feet. (Yes, that particular pool is 45ft deep, it is used for scuba diving practice).

If sucessful, I intend to do two things:
1. add a flashlight to my system, cause underwater it gets dark and I would expect that I need more light.
2. go shoot some video of me scuba diving!

I have uploaded a brief sketch of the box, it is all approximate. It is here:

plan_uwater_camera_housing by ~jzoudavy on deviantART

and have the following questions:

1. where would you recommend that I add the light?
2. any tips for videotaping underwater?

I have two 9 LED flash lights that's quite powerful, not sure exactly how many lumens they got.

thanks everyone!
davy