Baby tank question - T5

[Aquattro]

Just wondering who's had success with SPS under 4 2ft T5 bulbs. By success I mean you have to trim them more than you'd like, with great color

I've got 4 bulbs in 2 fixtures on a 12" deep frag tank and they in no way look bright enough. It is possible the bulbs are 2yrs+, given to me so no idea. I just don't want to replace bulbs if it's not enough and then buy a new LED. Thoughts?