Going into the 6th week of veg. Using the mars hydro sp 6500. Looking good. I must say.
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I have the smaller SP-150 150watt light filling in the end of my 3x4 tent. I think its a fine light. Not Samsung but it seems to supplement that end with no lack of quality at all.
I have an FC-3000 in the main area. It uses LM301B diodes.
Yours look great and if anything maybe just a touch too much light, but its keeping those girls short for the upcoming stretch.
Gonna be a nice harvest at the end.
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I been lst training my but off. The light is on a dimmer its only at 50 % and almost 3 feet above the plants probably higher then that. The one in the bottom left ,i think i counted 16 tops. Gonna veg another 2 more weeks.
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@Bluedream1 your light should be at 70% for vege,
Unless you measure it another way 
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Oh maybe i should adjust then.
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Yes brother, i would if it was me
70% for vege stage and 100% for flower.
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