Is the light intensity adjustable or is it just ON and OFF?
THOMAS B It's just on and off. Really good light and very bright. I use it as a primary. and my back ups are the ikelights like this PCm but with less lumins. One set of batteries lasts me all week with a couple of night dives and some wreck penetrations.
JEFFREY M It has 3 modes: On, Off, and Explode. The unit leaked, filling with salt water. As i opened it to find out why it wasn't working, it exploded, spewing battery acid on my face and clothes.
Leisure Pro didn't help me but Ikelite did replace the unit. Can't wait to try it again!
CHERYL D The light is on or off. It is not adjustable
JAMES O It is only ON/OFF.
DALE F It is just on or off. That being said, my sister and I each have one and LOVE them! They are small enough to carry in one hand with the ability to use a second tool. My sister uses it with her camera setup. Also, if it is too bright, eg night, etc, you can easily partialy cover the lens with your fingers. We used ours with Mandarine fish that are notoriously shy of lights.
STAN H No adjustment, just on and off.