What is a Footcandle?
A footcandle is a measurement of a lamp’s light intensity of a lamp, defined as the illuminance on a square foot surface from a uniform source of light. One footcandle is equal to the intensity of light emitted by a single candle at a distance of one foot.
How Many Footcandles are Needed for Indoor Growing?
The ideal footcandles for indoor cultivation varies depending on the specific plants you are growing. Generally speaking:
- Low-light plants need 50-250 footcandles.
- Medium-light plants need 250-1,000 footcandles.
- High-light plants need upwards of 1,000 footcandles.