How much light per plant?

Seedlings need lower intensity; flowering plants 20-50+ watts per sq ft depending on type (LED vs HID).

Follow manufacturer; too close burns, too far stretches plants. Use PAR meter for precision.

Grow Light Coverage Calculator

Determine the appropriate grow light wattage and coverage area based on your plant

Determine the appropriate grow light wattage and type for your indoor plants.

Grow Area Length (feet)

Grow Area Width (feet)

Desired Light Intensity

The full supporting guide for this calculator is still being expanded. The tool remains accessible while we improve the educational content.

Continue with calculators that answer nearby questions and help compare the next step.

Estimate the BTU output needed for a greenhouse heater based on its volume and the desired temperature difference.

Find the approximate number of daylight hours for any date and latitude, crucial for understanding plant photoperiods.