Yeah, if you can find the right color temp it should work ok. But then you're still talking similar lumens per watt as an average T8 fluoro. That one's 54 watts, T8s are in the 50-80 range. So you'd need 8 of them to match the light output of a single 4 foot fluoro tube with a good reflector. At least 16 or so for a 200l 4 foot tank. So that's $640 before fittings to match a $50 4 ft dual fluoro. Now, the need for a good reflector for the fluoro bumps it back towards the leds a little...But not much.