Plant Growing Light Bulbs

For vegetative growth choose lights with strong blue spectrum (around 400–500 nm); for flowering and fruiting choose lights with stronger red spectrum (around 620–750 nm). Full-spectrum or multi-channel LEDs are versatile for all stages and simplify switching between growth phases

Measure light in PPFD (µmol/m²/s) or use approximate wattage per square foot: low-light plants need about 10–20 W/ft², medium-light 20–40 W/ft², and high-light plants 40–60+ W/ft² when using LED fixtures; adjust by fixture efficiency and distance to plants

Typical hanging distance is 6–24 inches depending on bulb intensity—start higher and lower gradually to avoid leaf burn. Daily photoperiods: most vegetables 14–18 hours light for vegetative stage and 12 hours for flowering; adjust for species-specific needs

LED grow bulbs are generally more energy-efficient than incandescent or CFLs and produce less heat due to higher efficacy; however, high-output LEDs still generate heat and may require passive or active cooling to maintain fixture longevity

Look for fixtures with durable housings, reliable heat sinks, consistent spectrum specifications, dimmable drivers, and IP ratings if used in humid environments. Replaceable diodes or modular designs extend service life

Quality LED grow bulbs commonly have rated lifespans of 25,000–50,000 hours; maintenance includes keeping heat sinks and lenses clean, ensuring proper ventilation, and checking drivers or connections periodically

Prices for household and hobby LED grow bulbs and small fixtures typically range from under $25 for basic bulbs to (price varies)–150 for higher-output or full-spectrum units; commercial fixtures for larger setups cost more