I have two of the BPS Style they have that are optional to run on either D cell batteries or on 12 volt elec. from a battery in your boat. But the newest thing I found is the LED Blacklight that attaches to your Hat bill. Has 3 strong LED Blacklights that run on watch type batteries. I haven't used the new type yet but have used the ones with the white lights a lot, they work great. So I figured the Black Light type will work just as good or better. G/L