Optimize your cultivation facility or retail inventory with high-performance grow light lamps designed for Controlled Environment Agriculture (CEA). From high-intensity discharge (HID) to ceramic metal halide (CMH), Hydrofarm distributes industry-leading technology that empowers growers to achieve greater consistency, efficiency, and yield.
Light is the most critical variable in your indoor garden or greenhouse. Whether you are outfitting a large-scale commercial operation or stocking shelves for serious hobbyists, the quality of your light source defines the quality of the crop.
Hydrofarm offers a robust catalog of grow lamp replacements compatible with standard light fixtures and reflectors. Our selection includes high-intensity double-ended (DE) lamps and spectrum-specialized bulbs designed to drive photosynthesis and maximize plant growth.
No. Standard incandescent household bulbs are not suitable for horticulture. They generate excessive heat relative to the light produced and lack the specific spectrum required for vigorous growth. A dedicated grow lamp—whether it is HPS, MH, CMH, or an LED plant light—is engineered to output the high-intensity light (PAR) necessary for plant biological processes.
The "best" bulb depends on the growth stage. Metal Halide (MH) and CMH bulbs are typically rich in blue light, making them excellent for vegetative growth and stocky plants. High-Pressure Sodium (HPS) bulbs emit a spectrum heavy in red light, which is the industry standard for inducing and supporting the flowering phase in commercial settings. Full-spectrum grow light options, such as many modern LEDs and CMH lamps, can often be used from seed to harvest.
Generally, no. A standard LED bulb found in a hardware store is designed for human visibility (lumens), not plant growth (PAR). A specialized LED grow light bulb, or fixture, is tuned to specific wavelengths that drive photosynthesis. While a regular LED might keep low-light houseplants alive, it will likely not provide enough energy for fruiting or flowering crops.
Wattage requirements vary by canopy size and crop type. For commercial flowering footprints (e.g., 4'x4' or 5'x5'), 1000W DE HPS lamps are common. For vegetative stages or smaller grow tent setups, 315W CMH or dimmable LEDs of lower wattage may suffice. It is important to match the wattage to the square footage to ensure the canopy receives enough light without causing heat stress.
Yes, this is a standard practice in greenhouse cultivation. Supplemental lighting is used to extend the "day" length (photoperiod) during winter months or to boost light levels during cloudy days. High-efficiency fixtures, such as LED grow lights or DE HPS, are often used to ensure consistent production schedules regardless of the weather outside.
Plants utilize different parts of the spectrum for different tasks. Blue light (cool, ~4000K-6500K) mimics spring and summer sun, promoting leafy, vegetative growth. Red light (warm, ~2000K-3000K) mimics the late summer and autumn sun, triggering flowering and fruit production. Full-spectrum LED and white-light CMH sources provide a balance, closely replicating natural light, which is beneficial for overall plant health and for accurate visual inspection of the crop.
