i have no idea where to get or borrow one of those. let me put it like this, brightness won't be a problem. it's a 1.5 gallon tank

plant growth will be the problem.
it's hard to see in the picture, but the light isn't very disperced, it's very concentrated.
another thing is, the power supply im using could potentually run 75 of these led's. im running 18, so if it's not bright enough i can go 2 times to 4 times the amound of led's.