Free Grow Light Distance Tool
Pick your light type and power to see how far it should sit from the canopy.
Why Distance Matters
Too close and leaves scorch; too far and growth goes weak and stretched. Raise the light as the plant grows, and run it 12–16 hours a day on a timer.
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Try another calculator or identifier — no sign-up needed.
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Estimate how much water is left in the soil by comparing pot weights.
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Build a safe day-by-day ramp when moving a plant into brighter light.
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Grow Light PAR Estimator
Check the real light your plant gets from a grow light and set the right height.