mr_X
Aquarium Advice Addict
I think the 25 should be fine. If you get the 40, you should invest in a 5 dollar dimmer switch to slow it down even more than the lowest setting-
PWM Dimmer Switch in Line Manual Knob Style 12V 24V for 1 Single LED Strip Light | eBay
I have a 105 rimless and recently aquired my second wp40 (the first crapped out on me in only 3 months, and no one would honor the warranty), and I use this dimmer because the lowest setting is too much for my 48x24 tank.
PWM Dimmer Switch in Line Manual Knob Style 12V 24V for 1 Single LED Strip Light | eBay
I have a 105 rimless and recently aquired my second wp40 (the first crapped out on me in only 3 months, and no one would honor the warranty), and I use this dimmer because the lowest setting is too much for my 48x24 tank.