400 Watt Grow Light Bulbs

Got questions about plant lighting? Check out GYO's guide to Lighting Your Indoor Garden and light it up the right way!

Need help determining the best lighting for your space? Call the GYOstuff grow light experts at (617) 945-1654. We're here to help!

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Hortilux 400W e-Start Metal Halide Bulb Hortilux 400W Blue (Daylight) Metal Halide Base-Up Bulb Hortilux 400W Blue (Daylight) Metal Halide Bulb
Hortilux 400W e-Start Metal Halide BulbHortilux 400W Blue (Daylight) Metal Halide Base-Up BulbHortilux 400W Blue (Daylight) Metal Halide Bulb

Electronic ballast friendly

Premium, high quality grow bulb

Premium, high quality grow bulb

$76.95

$69.99

$129.95

$119.99

$129.95

$109.99

Hortilux 400W Metal Ace HPS-to-MH Conversion Bulb Hortilux 400W Metal Halide Horizontal HO Bulb Hortilux 400W Super HPS Enhanced Spectrum Bulb
Hortilux 400W Metal Ace HPS-to-MH Conversion BulbHortilux 400W Metal Halide Horizontal HO BulbHortilux 400W Super HPS Enhanced Spectrum Bulb

For use with magnetic HPS ballasts

Cost effective 400W metal halide bulb

For big, robust blooms. The best HPS grow bulb available.

$99.95

$89.99

$74.95

$66.99

$94.95

$79.99

Ushio 400W Super HPS Bulb Ushio 400W Super MH HPS-to-MH Conversion Bulb Sylvania 400W HPS Bulb
Ushio 400W Super HPS BulbUshio 400W Super MH HPS-to-MH Conversion BulbSylvania 400W HPS Bulb

400W super high pressure sodium bulb

400W metal halide conversion bulb

400W high pressure sodium grow bulb

$75.95

$67.99

$88.95

$84.49

$25.95

$23.99

General Electric 400W Lucalux HPS Bulb Sylvania 400W MH Base Up (High Output) Bulb Sylvania 400W MH Horizontal (High Output) Bulb
General Electric 400W Lucalux HPS BulbSylvania 400W Metal Halide Base Up (High Output) BulbSylvania 400W Metal Halide Horizontal (High Output) Bulb

400W high pressure sodium bulb

400W metal halide grow bulb

400W metal halide grow bulb

$61.95

$57.99

$61.95

$54.99

$61.95

$54.99

Sylvania 400W MH Universal Bulb 400W MH Unv Cool Deluxe 400W MH Warm Deluxe
Sylvania 400W Metal Halide Universal BulbSunmaster 400W Metal Halide Universal Cool Deluxe BulbSunmaster 400W Metal Halide Warm Deluxe Bulb

400W metal halide grow bulb

400W metal halide grow bulb

400W metal halide grow bulb

$33.95

$29.99

$90.95

$85.99

$79.95

$69.99

Sunmaster Full Nova 400W Metal Halide 6000K Universal Bulb Agrosun 400W Gold Metal Halide Horizontal Bulb Venture 400W HPS-to-MH Conversion Bulb
Sunmaster Full Nova 400W Metal Halide 6000K Universal BulbAgrosun 400W Gold Metal Halide Horizontal BulbVenture 400W HPS-to-MH Conversion Bulb

The best all-in-one bulb

Halide bulb with more red than other halides

400W metal halide conversion bulb

$99.95

$89.99

$69.95

$62.99

$69.95

$64.99

SolarMax 400W HPS-to-MH Conversion Bulb SolarMax 400W Super HPS Bulb Venture 400W Metal Halide Bulb
SolarMax 400W HPS-to-MH Conversion BulbSolarMax 400W Super HPS BulbVenture 400W Metal Halide Bulb

400W metal halide conversion bulb

400W super high pressure sodium bulb

400W metal halide grow bulb

$113.95

$99.99

$57.95

$51.99

$96.95

$85.99

Xtrasun 400W HPS Bulb Xtrasun 400W HPS-to-MH Conversion Bulb 7200K Xtrasun 400W Metal Halide 4200K Bulb
Xtrasun 400W HPS BulbXtrasun 400W HPS-to-MH Conversion Bulb 7200K Xtrasun 400W Metal Halide 4200K Bulb

400W high pressure sodium bulb

400W metal halide conversion bulb

400W metal halide bulb

$19.95

$17.99

$34.95

$29.99

$29.95

$24.99

Xtrasun 400W Metal Halide 7200K Bulb
Xtrasun 400W Metal Halide 7200K Bulb

400W metal halide bulb

$39.95

$34.99

1 - 25 of 25 items