Cyberlight CX Poor Light Output

I have a total of 9 Cyberlights, of which probably 6 are decent...

Basically I put a Cyberlight CX next to a 500 watt fixture and the 500 watt fixture blows it out of the water.

The cyberlights are using brand new bulbs and so are the 500 watt fixtures.

Is there something that could be causing this poor output? They're running on the same power as the 500 watt fixture, which is 220v.

I was told maybe it could be the capacitors, but I don't want to go out and spend $88 each only to find that's not the issue.

What do you guys think?
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