Adding cree leds to current led light fixture

[cmholl]

I have a 20in aqueon modular led light fixture with the three bulbs. Each bulb has 9 leds and each led/chip is .22 watts at 20 lumens. So I have a total of 6watts with 540 lumens. I also installed 4-4in blue led flex strips on the inside. Not sure how many lumens those are. I'm wantin to start corals in my tank an I know this light won't cut it so what I'm wondering is how many cree 3watt leds would I need to safely keep corals. Would be 1:1 cool whites and royal blues. I have a 37 gallon column tank that is 20x18x24 (LXWXH).

 

[vestard]

Quote:
Originally Posted by cmholl http:///t/394999/adding-cree-leds-to-current-led-light-fixture#post_3516028
I have a 20in aqueon modular led light fixture with the three bulbs. Each bulb has 9 leds and each led/chip is .22 watts at 20 lumens. So I have a total of 6watts with 540 lumens. I also installed 4-4in blue led flex strips on the inside. Not sure how many lumens those are. I'm wantin to start corals in my tank an cheap speakers I know this light won't cut it so what I'm wondering is how many cree 3watt leds would I need to safely keep corals. Would be 1:1 cool whites and royal blues. I have a 37 gallon column tank that is 20x18x24 (LXWXH).
Take expert guidance. It is hard to tell how many lumens you need.