Might not be enough for a T5 fixture... My ATI 8 bulb is a lot heavier. Super clean design though! I'm enjoying your build thread!!At least 20 pounds or so. Way more than enough for lighting. It’s made from 5/8” solid alum bar. The nice thing about it is it has rubber pads and sits right on the eurobracing (it’s light). Easy to move around or take off.