MH
Understanding HID Bulbs HID Bulb Comparisons

To learn more about HID lighting read our buyer's guide. HID Lighting Buyer's Guide. Also check out our HPS Bulb Comparison Review to find the best value bulb for your garden. Metal Halide (MH) bulbs should be used for the vegetative phase. MH bulbs give off a blue to white spectrum

 

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  1. HORTILUX BLUE Metal Halide grow lamps provide world class spectrum that is unmatched in the lighting industry. HORTILUX BLUE is the closest match to natural sunlight of any light source available today. Growers House recommends to use either magnetic ballasts, or specifically the Hortilux or Galaxy digital ballast to use with Hortilux Blue Lamps. Hortilux Blue Metal Halide lamps are not compatible with many other electronic ballasts, including Solis Tek. Learn More
  2. Green Harvest Grow Lamps emit balanced light similar to a 4,000°K source, imitating the natural white look of sunlight. They are ideal single lamp sources for practically all phases of plant growth. Designed for optimal performance on electronic ballasts. Learn More
  3. SOLARMAX lamps deliver 30% more "nutritious" Blue light radiation than standard lamps. The result - more vigorous, vegetative growth and stronger roots during the important early stages of a plant's development. Learn More
  4. SunPulse 250w MH Pulse Start lamps have an extended spectrum perfect for any stage of plant growth. Available in 4000, 6400 and 10000 K color temps and compatible with any certified electronic or digital ballast. Learn More
  5. GrowLite's Tru Blue MH lamps are Open Rated for your safety. Tru Blue has a spectrum perfect for huge, bushy, vegetative growth. With a 12,000 hour lifetime and a 6500K color temp, and available in 400, 600, and 1000w, satisfaction is guaranteed. Learn More
  6. UltraSun feature a great spectrum with durability and functionality all at great price. This lamp has an initial intensity of 36,000 Lumens and a color temperature of 4200 K. Learn More
  7. UltraSun 1000w MH is a quality lamp with an economic price. With an initial intensity of 86,000 lumens and a color temperasture of 4200 K, this is a great addition to any grow room. Learn More
  8. 25% more energy in the spectra that plants use to photosynthesize. Optimized bulb for digital/electronic ballasts. Designed for maximum lumen output. STOP SALE. Learn More
  9. Plantmax 1000w MH lamp provides a wide spectrum perfect for vegetative stages of the growth cycle. 4200K color temp and 10,000 hour lifetime, these cost efficient lamps make an excellent addition to any grow room. Learn More
  10. Plantmax 1000w MH lamps offer adjusted spectrum ideal for vegetative stages of the growth cycle. This lamp has a 7200K color rating and 24,000 hour lifetime, and with cost efficiency to match, this is a perfect addition to any grow room. Learn More

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MH

Metal Halide bulb

HID bulbs are categorized by the type of gas used in the bulb. The primary types used in horticulture include metal halide (MH), and high-pressure sodium (HPS). The main difference between the two bulbs is the type of light spectrum they produce (because of the gas inside). A metal halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides. Metal Halides also produce more pure white light than the HPS lamps, closer to daylight frequencies making it especially useful for growing plants. The MH bulb focuses on more of a blue spectrum and is used primarily for the vegetative stage of plant life.