Grow Lights for Indoor & Outdoor Plants — LED, HPS, CMH & Fluorescent
Every indoor growing operation depends on grow lights to replace or supplement natural sunlight. The right grow light technology depends on your crop type, room size, ceiling height, energy budget, and the growth stage you’re supporting. Hydrobuilder carries the full range of horticultural lighting technologies — from entry-level fluorescents for propagation up to commercial-scale LED and HID systems for production operations.
LED Grow Lights: The Modern Standard
LED grow lights are now the dominant technology for new commercial builds and home grow room upgrades. Modern full-spectrum LED fixtures deliver equivalent or greater photon output than HID at 30–50% lower energy consumption, with significantly reduced radiant heat that lowers HVAC demands. Bar-style LED arrays provide superior canopy uniformity; dimmable drivers allow output adjustment by growth stage. Qualified LED brands at Hydrobuilder include Growers Choice, Gavita, Faven Lighting, Matrix, Photontek, ThinkGrow, AC Infinity, and Mars Hydro across wattages from 100W to 2,000W+.
HPS & Metal Halide: Proven HID Performance
HPS and MH grow lights have been the commercial standard in indoor horticulture for decades. HPS provides intense red-spectrum output ideal for flowering and fruiting; MH delivers blue-spectrum light suited to tight vegetative growth. Double-ended HPS fixtures produce 10–30% more PAR than single-ended designs and remain cost-competitive at large commercial scales with established infrastructure. DimLux, Phantom, Iluminar, Matrix, and Gavita are the qualified HID brands available here.
Ceramic Metal Halide (CMH/LEC): Full-Spectrum Efficiency
Ceramic metal halide (CMH) fixtures use a ceramic arc tube rather than quartz for superior spectral output, including UV wavelengths that support plant defense compound production. CMH lamps maintain lumen output longer than standard MH and provide a more complete light spectrum than HPS alone — making CMH a popular choice for growers who want the spectral quality of natural light with practical energy efficiency.
Fluorescent T5 & CFL: Propagation & Low-Light Applications
Fluorescent grow lights (T5 tubes and compact fluorescents) produce low heat and are well-suited for seedlings, clones, mother plants, and low-light crops where the high-intensity output of LED or HID would stress young plant tissue. T5 fixtures can be positioned just inches above plant canopy, making them efficient for propagation rack systems and multilayer seedling production.
Sizing & Support Tools
Choosing the right fixture type and wattage requires matching your canopy area and crop light requirements. Use our PPFD & Light Coverage Calculator to model fixture placement and confirm DLI targets, and our Electricity Cost Calculator to compare running costs across technologies. For commercial facilities, explore our LED rebates and utility incentive programs that may offset significant portions of fixture costs.
Browse by technology: LED, HPS & MH, CMH, Fluorescent. Or explore ballasts, hoods and reflectors, and replacement bulbs. Expert support available.
