Grow Lighting FAQs – Feit Electric

Grow Lighting

Read the article below for tips and information about LED grow lighting. You can also watch this how-to grow video.

PPF measures the total amount of PAR that is produced by a lighting system each second.
PAR is the amount of light that’s usable to plants- those wavelengths that will be used for photosynthesis. Just like the difference between a growing area and a canopy, PAR is not the measure of all of the light a grow light gives off, but the measurement of the wavelengths plants will absorb.
The photon flux is defined as the number of photons per second per unit area: The photon flux is important in determining the number of electrons that are generated, and hence the current produced from a solar cell.
Luminous Flux is the measure of the brightness of a light source in terms of energy being emitted. Luminous flux, in SI units, is measured in the lumen (lm). It is a measurement of energy released in the form of visible light from a light-producing source.
Correlated color temperature (CCT) is a measure of light source color appearance defined by the proximity of the light source's chromaticity coordinates to the blackbody locus, as a single number rather than the two required to specify a chromaticity.
Color rendering index (CRI) is a quantitative measure of the ability of a light source to reveal the colors of various objects faithfully in comparison with an ideal or natural light source. Light sources with a high CRI are desirable in color-critical applications such as neonatal care and art restoration.

The higher the better (in most cases). PAR is what plants can use to create the energy they need to grow.

Light Bleaching/ Light Burn will cause your plant to turn albino as a result of strong LED and HPS lights that are situated too close to the top of your plant. In this situation adjust the distance of the light to the plant.
- We would suggest starting by raising the lamp 2 inches. Keep an eye on the plant. If the yellowing does not go away after 3 days, raise the lamp again.

Full Spectrum is the mixture of a blue spectrum and a white spectrum of light.
- This is good for the seedling stage.
The Red Spectrum is a mixture of the red spectrum and white spectrum of light.
- This is good for the flowering and vegetation stage.

High Light plants
- Tomatoes, peppers, perennials, ETC
  - Seedlings- Start at 6" for the first 2 weeks. Once the plant can support itself with flowers move into the vegetative stage
  - Vegetative and/or Flowering Stage 16-30"
Low Light Plants
- Herbs and Leafy greens (such as basil and lettuce)
  - Seedlings- Start at 6" for the first 2 weeks. Once the plant can support itself with flowers move into the vegetative stage
  - Vegetative and/or Flowering Stage 16-30"

12in fixtures will cover a 12 in by 12 in area
Bulbs (A19, BR30, and PAR38), Clamp Light, and 2ft fixtures will cover a 2ft by 2ft area
4ft fixture will cover a 4ft by 4ft area

Please check the ballast compatibility list- https://www.feit.com/ballast_compatibility/

From the wall switch, turn the fixtures on/off in 7 complete cycles. (on then off is 1 cycle.). This will reset the bulbs/fixtures to the lowest setting option.