Yea, I only need it for a 90 gallon so I think 3 of them might be overkill. Do you think one would be sufficient? That 8 wire supply jack seems like a bit of overkill if I only plan on running one of those 3 led lights. I'm wondering if I could take an older 12 volt power supply cord and cut/splice/soider it into the new led wire and call it good. Of course I would cover this in electrical heat wrap. What do you all think? I'm looking at less than $10 if it works as planned, $8.49 to be exact.