FAQ
LED Grow Lights FAQs
What spectrum of light do plants need to grow indoors?
Plants primarily use two spectrum ranges for photosynthesis: blue light around 450nm, which promotes leaf development and vegetative growth in the seedling and early stages, and red light around 655–660nm, which drives flowering and fruiting in later stages. Full spectrum grow lights cover both ranges and are suitable for all growth phases. Feit Electric LED grow lights are engineered to emit precise 450nm blue and 655–660nm red wavelengths for optimized photosynthetic response.
What is PAR or PPF and why does it matter for grow lights?
PAR stands for Photosynthetically Active Radiation, and PPF (Photosynthetic Photon Flux) measures how many light photons in the PAR range a grow light emits per second. A higher PAR/PPF value means more usable light energy reaches your plants. Herbs, succulents, and low-light houseplants do well with PAR values of 14–20 PPF, while fruiting vegetables and flowering plants benefit from higher output. Feit Electric lists PAR/PPF values on every grow light product page so you can match the light to your plants.
Can I use a regular LED bulb as a grow light?
Regular white LED bulbs are not optimized for plant growth because they do not emit concentrated blue and red spectrum wavelengths in the ratios plants need for photosynthesis. Dedicated LED grow lights are designed to emit precise wavelengths that drive vegetative growth and flowering, delivering better results than standard bulbs. Feit Electric grow bulbs fit standard A19 and PAR38 sockets but are engineered specifically for plant photosynthetic response — making them a straightforward upgrade from regular bulbs.
Are LED grow lights safe for hydroponics and high-humidity environments?
Yes. LED grow lights designed for horticulture use are rated for high-humidity environments, making them compatible with hydroponic, aquaponic, and soil-based growing systems. LED technology also runs significantly cooler than HPS or fluorescent alternatives, reducing the risk of heat stress and leaf burn when lights are placed closer to the canopy. All Feit Electric grow lights carry a damp-location safety rating and are suitable for use in humid indoor growing environments.
How close should I place a grow light to my plants?
Placement distance depends on the light's wattage and PAR output, but LED grow lights generally allow closer placement than HPS or fluorescent fixtures because they run cooler and produce less radiant heat. As a general guideline, lower-wattage bulbs (9W–17W) can be placed 6–12 inches from the plant canopy, while higher-output fixtures may need to be 12–24 inches away. Feit Electric LED grow lights are specifically designed for cool operation so you can position them closer to plants without risk of leaf burn.
