since this thread has already majorly sidetracked... I've been using plant LED light strips on my tanks... they are water proof, & have built in timers... I usually use 3 sets ( one light uses 2 - 18" LED strips ) I usually stagger the timers to get light when I want, as 12b hours in the max option on the timer ( I use an LED black light to come on an hour before the white light, then go off, & come on again just before the white lights go out, & remain on, an hour after the white lights go out...
the only complaint with this system, is they all use USB plugs, rather that the standard 110 volt plug... so 4 USB's per tank... I've been buying these boxes with 4 USB plugs, that plug into 1 -110 volt plug... the trouble is, these adaptors start feeding stray voltage or ??? & my lights quit working on them ( had 3 of them fail in the last 6 months ) fortunately the lights are fine, after a group box fritzes out... the lights all come with a single USB adaptor, but that of course would take up 4 110 volt plugs per tank, if I use the ones that came with the lights... so I've been trying different brands of these multi USB plug boxes... but end up with that extra expense, and inconvenience on my timers all goofed up each time it happens, or I switch adaptors... they seem to work fine for 4-6 months, then start goofing up my lights... the lights aren't sucking the kind of power that a cell phone would, while charging, so I find the short life unacceptable