Gavita HPS w/built-in reflector 

The Gavita High Pressure Sodium bulb has a built-in reflector that's unique in the hydroponics industry. This distinctively shaped bulb is specially coated like a mirror on 1/2 of its inside surface to produce an incredible 95% rating on usable light. 

As there's no outside reflector to trap heat you can place the bulb much closer to your plants without worry of scorching. This results in increased lumen exposure and strong healthy growth.

Plus you eliminate bulky exterior reflectors when using the Gavita's builtin reflector, so it's ideal for small growing spaces. The Gavita HPS lamp is universal, for both horizontal and base-up operation.

Mogul based Gavita HPS lamps work with any appropriate wattage High Pressue Sodium ballast. One-year warranty covering breakdown of performance, materials or workmanship.

400 watt:

Dimensions: 12.6" long x 2.8" diameter
Lumens: 58,000
Hour Life Rating: 24,000
Kelvin: 2100 degrees
600 watt:

Dimensions: 12.6" long x 2.8" diameter
Lumens: 95,000
Hour Life Rating: 24,000
Kelvin: 2100 degrees

Gavita HPS with Built-in Reflector 400W

$99.95

Gavita HPS with Built-in Reflector 600W

$124.95