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Budtirement
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They're off to a fine start! Keep an eye out for yellowing leaves and tips and curling edges which would indicate too much light. LED's are very powerful. They will burn your plants if they're too close. Follow Newty's instructions for healthy veg.12" light height is to close IMO. The manuals that come with led lights that show recommendations for height and intensity are often way too much.
Seedling stage - I run at 36" height, 20% intensity
Veg - 30" height, 30%-40% intensity. Let plant grow to 24" and move light back to 30"
Flower - I stay at veg settings and after a few weeks start increasing intensity until middle of flower, let it ride at higher intensity for a few weeks and start lowering intensity again toward harvest.