@Gibbslt89
The panels use a different type of bulb called "dip" which is like x-mas tree bulbs- the UFO LEDs and newer fixtures use bulbs with "smd" chip technology.
The smd chips have higher watts and give off more lumens. (I do a fair amount of LED research lol)
From what Ive read, the panels have 400 Lum, my 50w UFO has 2,400 Lum, & the 90w has 3,800 Lum.
I will be taking clones and using LED, thinking of upgrading from my 90w+50w to just 1x 120w LED fixture.
So far, my veg plants have exceeded my expectations with the LED.
[video=youtube;dIdpZXC8840]http://www.youtube.com/watch?v=dIdpZXC8840[/video]