dude no choice u must grow with 400watt get this one cuz it gives u a hps bulb for flowering and one metal halid for veging. its perfect and only $160
the only thing is you may want a better reflector than come with it. i ended up getting a bigger reflector to maximize my lights potencial:
HTGSupply Ultimate 400w HPS & MH Grow Light
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ULTIMATE 400 WATT GROW LIGHT SYSTEM BOTH HPS & MH
Here it is, the ULTIMATE Grow Light, a 400 watt High Pressure Sodium grow light system combined with a 400 watt Metal Halide grow light system. This ULTIMATE system includes one fantastic grow light ballast, two specialty horticultural bulbs (lamps), an awesome four-side horizontal reflector and a FREE heavy duty timer. This is a better value in grow lights than you would find at any other hydroponics store.
WHY DO YOU NEED BOTH A METAL HALIDE GROW LIGHT AND HIGH PRESSURE SODIUM GROW LIGHT?!!
Using Metal Halide grow lights and then switching to High Pressure Sodium grow lights is THE way to GROW the BEST PLANTS POSSIBLE. Growers worldwide consider the best way to grow flowering plants is by vegetatively growing them under the bright white light of the METAL HALIDE then switching over to the HIGH PRESSURE SODIUMs super bright orangish/red spectrum for the flowering stage of plant growth. The MH grow light bulb provides lush, compact plant growth. The HPS grow light bulbs spectrum mimics that of the "harvest sun" and promotes explosive, prolific flowering of plants.
LIGHTING BALLAST AND HOUSING
Dimensions: 9" long x 4" wide x 5.5" tall
The grow light ballast is a brand new REMOTE 400 watt HPS grow light ballast, with an innovative design that separates the ballast core away from the capacitor and igniter components to provide high performance and long life. This grow light ballast is made to our specifications with high output lighting results for horticulture / hydroponics / indoor gardening use. The High Pressure Sodium grow light ballast also features a convenient retractable handle with large keyholes for wall or ceiling mounting options. The lighting ballast also has over-sized rubber feet for electrical safety and quiet operation. The 8 foot power cord and 10 foot light bulb output cords are constructed of the highest quality, heavy gauge industrial grade electrical cord usually seen on grow lights costing much more. The ballast is pre-set and ready to plug into standard 110/120 household voltage, but can easily be changed to 220/240 volts. The 400 watt High Pressure Sodium grow light ballast will operate any standard or horticultural 400 watt High Pressure Sodium lamps and 400 watt Metal Halide Conversion lamps (see below). The universal socket set can be used with many other reflectors for future upgrades including air-cooled reflectors, umbrella style hoods or many other grow light reflector hoods, making this system the best value in hydroponic and indoor gardening lighting.
FOUR-SIDED HORIZONTAL GROW LIGHT REFLECTOR
Dimensions: 15.5" long x 12.5" wide x 6" deep
This quality grow light system features a lighting reflector hood that is a highly efficient FOUR sided reflector. This top of the line HORIZONTAL REFLECTOR is made from the HIGHEST QUALITY MATERIALS available! Specifically designed for growing plants indoors, this reflector incorporates a steel socket/reflector bracket, 5kv Pulse Rated Mogul Based socket and highly reflective polished aluminum reflector. The highly polished aluminum reflector has a mirror-like finish rated at 95% reflectivity for MAXIMUM LIGHT OUTPUT. This reflector hood is built to last a lifetime and can easily be cleaned with common household window cleaner. The grow lights Horizontal lamp configuration design allows for the greatest light coverage over the top of your indoor garden area while providing the highest light intensity levels possible. It is widely recognized that the BEST design for horticultural and hydroponic reflectors is the HORIZONTAL REFLECTOR design incorporated with this reflector. Additionally, this versatile grow light reflector can be used as a 4 sided reflector or as a completely adjustable BATWING reflector, your choice. Utilizing all four sides of the reflector ensures that every single lumen produced from the lamp/bulb is emitted downward onto your plants and not out onto your grow room walls. This grow light reflector hood comes with two heavy duty steel hangers to hang your reflector from and a 10 cord from the reflector to the remote 400 watt High Pressure Sodium ballast housing.
400 WATT HORTICULTURAL GROW BULB (400 WATT HIGH PRESSURE SODIUM BULB )
This quality grow light system features an awesome light bulb made especially for hydroponics. This is not your ordinary 400w HPS lamp/bulb. This is a specialty high output 55,000 lumen 400w HPS bulb which is much brighter than standard bulbs which emit only 45,000 - 50,000 lumens. This grow light lamp is custom made plant grow light bulb for indoor gardening, with extra blue spectrum added for improved indoor plant gardening growth. This spectrally enhanced bulb will make your indoor or hydroponic garden into a tropical jungle! This bulb starts out brighter and stays brighter longer than your cheap run-of-the-mill standard HPS bulbs. A brighter bulb means more plant growth and higher plant yields. This grow light bulb has a long rated life of 24,000 hours.
400 WATT HORTICULTURAL METAL HALIDE CONVERSION LAMP
This is a top of the line, high output, specialty horticultural Metal Halide Conversion bulb. This is a specialty bulb made to operate specifically with the 400 watt High Pressure Sodium ballast that comes with this ULTIMATE grow light system. This Metal Halide grow light conversion bulb will promote strong, lush, compact vegetative growth for all green plants. This special high output Metal Halide Grow Light conversion lamp pumps out an amazing 38,000 lumens, compared to only 30,000-36,000 lumens for standard 400 watt Metal Halide lamps. Remember, HIGHER LUMEN OUTPUT equals HIGHER YIELDS. The Metal Halide grow light conversion bulb provides a balanced light spectrum of 4100 Kelvin, imitating natural sunlight?. This quality grow light bulb has a rated life of 20,000 hours.