They are supposed to be top notch (as long as you buy from a reputable company with a good track record) Only problem is they require batteries, which require electricity to recharge. Yes I know you can us non rechargeable batteries, but that might get real expensive.
On the other hand I have seen some that has a handle you crank to supply the power for the bulb to do it's thing. Then again, for that to work, you need real clear water to start with.
Last edited by SkunkHunter; 03/28/20 04:48 PM.