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light help

David Bowman

New Member
The K in 3900 refers to Kelvin temperature of the bulb. The lower the number the more red (warm) it becomes, the higher the number the more blue (cool) it becomes. 2000K-3500K is best for flowering and 5000K-6500K is best for vegetating.


New Member
i am sorry its 3900 lumens it says that its = to a 300w light so if i have 3 of them does that mean i have a 900w light
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