Lawn & Patio: Apollo Horticulture GLBHPS400 400 - Watt High Pressure Sodium HPS Grow Light Bulb Lamp - Apollo Horticulture
Lawn & Patio: iPower GLBULBH400 400-Watt Super HPS Grow Light Bulb for Magnetic and Digital Ballast - iPower Grow Light
Lawn & Patio: iPower GLSETX400DHMWING20T 400-watt Light Digital Dimmable Ballast System for Plants with Wing Set and Timer - iPower Grow Light
Lighting: Philips 36881-1 - LU400 - HPS - 400 Watt - Ceramalux - High Pressure Sodium - C400S51/ALTO - Philips
Lawn & Patio: iPower GLBULBM400 400-Watt MH Grow Light Bulb for Magnetic and Digital Ballast - iPower Grow Light
Lawn & Patio: Apollo Horticulture GLK400GW19 400 Watt Grow Light Digital Dimmable HPS MH System for Plants Gull Wing Hood Set - Apollo Horticulture
Lighting: LU70/MED 70 Watt HPS ED17 High Pressure Sodium Light Bulb, Medium Base, Clear - Green Energy Lighting
Lawn & Patio: Ushio US5001670 Enhanced Performance HPS Lamp, 600-watt, Opti Red - Ushio
Lawn & Patio: NEW! DIGILUX DX400 HPS 400W Digital Grow Light Bulb Sodium Hydroponics Quality - Ulti-Lumenx
Lawn & Patio: Earth Worth 5 Gallon / 8 Bag Bubble Extract System For Essential Oils and Scents - Earth Worth Quality And Affordable! - Earth Worth
Lawn & Patio: Ultra Sun 901528 High Pressure Sodium Lamp, 400-watt - ULTRASUN
Lawn & Patio: iPower GLSETX400DHMWING 400-Watt Light Digital Dimmable System for Plants - Wing Set - iPower Grow Light
Lawn & Patio: Earth Worth 6 Inch Charcoal Carbon Filter w/Pad For Grow Tents And Hydroponics - Earth Worth Quality and Affordable! - Earth Worth
Lighting: 400w Meatal Halide Lamp Repalcement 120w E39 Mogul Screw Led Warehouse Lighting
Single Detail Page Misc: 400 Watt Hydroponic Kit. - Sunlight Supply
Home Improvement: Philips 317107 SON Agro High Pressure Sodium 430-Watt ED18 Light Bulb - Philips
Lawn & Patio: GE 85379 LU400 High Pressure Sodium Light - GE
Pet Products: 400 Watt Reeflux 10,000k Reeflux Mogul Base - Reeflux
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Hps 400 Light Bulb Popular Q&A
Q: How hot does 400w hps bulb get?
A: According to Sylvania, their 400w lamps reach a maximum surface temperature of around 750F. This seems to be universal of all HID lamp types. Read More »
Q: How high should a 400 w hps light be above plants
A: Higher wattages (400W-1000W) should be place 4 to 6 feet from your ... ...MORE... Read More »
Q: Can you use a 250W Hps bulb in a 400W ballast?
A: The 250w lamp will burn hotter and a little brighter than normal but will use almost as much power as a 400w lamp. The ballast is trying to push that 400w into ... Read More »
Q: Can you use a 250w hps bulb in a 400w ballast?
A: No you can't, and don't try since it may explode and start a fire. Read More »
Q: How much does it cost a month to run a 400w hps grow light in los...
A: I ran a 1000 watt hps lamp 12 hrs a day and it cost me about $20 a month. I don't live in LA, but I can't imagine it costing much more than that. Read More »