Originally Posted by BayTib13
it would also depend on the tank length, width and depth, if yoh have a more compact light fixture, the light will be more condensed and therefore more effective, all be it a smaller area. and depth as well, as a shallow tank will have better light penetration. my tank is only a 36g, roughly 26x15x14
no. that's not true. you can't condense light. 1200 lumens is 1200 lumens.
i wouldn't put 1200 lumens over a nano.
here, check this chart out. it will give you an idea about what to expect in terms of lumens. (check out the spiral 20 watt bulb for comparison)-