i can vouch for the kessil H350 as a grow light, it's staggering the light it puts out for such a small package. i've used the kessil and one of those dark star types and the kessil blows the other away. the black box one was 240w and the kessil was 90w and has a radiator built in to the design to keep it cool. i think before long they will be able to bridge the gap with LED if they keep at it
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