I have the ultrasun ones on my 55 and my 16. Both are fast plant growing tanks. No issues whatsoever and the 16 has been running forever. I used to have the aqueon one on the 16 and my 72(I think
) . The zoomed one works better from what I can tell however for whatever reason I never bothered to run the solar meter under either of them.. and would be useless on the bulb on the 72 since it's older , and really I can't say for plant growth in that tank since it's the African tank.
I'd just say the ultrasun is better.. by how much I can't say