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Looks like two 315s.
Appreciate the input
link take me to home page.
As long as it comes with a proper low frequency square wave ballast and phillips bulbs it is a very good lamp.
I like my
sun system set. Only need 3100k bulbs unless trying to get even more uv. Then the 4000k veg bulb my suit you or mix them but even tje 3100k grows short leafy plants like full spectrum led.
My complaint is one cant really flower a 4x4 with bushes like a 600 hps can. But 2 would likely blow the 600 away. I got 15 oz with one 315 in a 3x3 when i tried clones for yield.
And when taking pics lines show in the image from the low frequency ballast.
For cooling my air cooled glass enclosed 600 is always a couple degrees hotter under than 1 open 315.