Plant Stage Light Hours Calculator

Find the optimal light hours and DLI for every stage of your plant’s life cycle. Enter your PPFD to get exact photoperiod recommendations and electricity costs per grow cycle.

Select your plant
Your light setup
Measured at canopy height
For electricity cost calculation

Please select a plant type and enter your PPFD.

Growth stages and photoperiod
0
Total grow days
$0
Electricity cost/cycle
0
kWh per cycle
Full schedule at your PPFD
StageLight hrsDLIDurationElec cost
Plant type
PPFD at canopy
Total grow cycle
Total light-on hours
Total kWh consumed
Cost per plant
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The calculators and tools on LightingCalc.lighting are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. LightingCalc.lighting makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.