Full-spectrum 450 watt LED light assembled in the USA. Rugged adjustable waterproof housing makes it perfect for harsh environments. Large, extra efficient heatsink with multiple heat pipes minimizes radiant heat. Specially designed reflector** spreads light evenly to your plants. Each light ships with one large centered eye hook for hanging.
OVER 20% MORE LUMENS, SAME WATTAGE!!!
Upgraded and improved light engine with newer and higher performing CREE LED chips.
**Spectrum King's 60° Reflector is made for high ceilings — anything 10ft+. It covers a 4x4 very nicely. With our 60° Reflector, you should keep your SL-400 LED Grow Light 2-3ft away from the canopy so it will not be too intense for your plants.
**The 90° Reflector is designed to produce more light spread, providing a nice 4x4 coverage area. The 90° Reflector allows you to lower the light 18" inches from the plant canopy.
NOTE: The 90° Reflector widens the spread but lowers light intensity
Spectrum King LED Grow Lights are designed to mimic natural outdoor sunlight. Why change what Mother Nature has already perfected over millions of years? Sunlight includes many spectrums, both visible and ones we cannot see; even traditional HPS lights put out a high band of nano-meter wavelengths (color spectrums) which is why it has been successful in the agriculture application today. LED grow lights that provide only 2, 3, 4 even 8 colors will never come close to reproducing the effects of sunlight.Replace your power hungry HPS with bright Spectrum King LED Grow Lights that imitate natural sunlight.
Spectrum King LED Grow lights consistently produce spectrums from 380-779nm. This means that not only virtually every visible color is present in the light, but also ones you can’t see. The Spectrum King Series 300 and Series 400 LED Grow Lights truly mimic sunlight and traditional HPS lamps with matching intensities of over 100,000Lux.
Spectrum King LED photosynthesis diagramWe all know that blue and red are the wavelengths that dominate the “active photosynthesis” portion of the spectrum, so you might think that providing these colors alone might circumvent the rules of nature. But there is a problem: Productive plants need to photo-respirate. When plants become heated (by intense yellow light) the stomata on the leaf surfaces open up and allow photo-respiration to occur. When photo-respiration takes place the plants go into “work out” mode and want to consume nutrients just like humans want to drink water. Traditional LED arrays only carry the spectrums that activate after the photo-respiration period takes place. This is the reason traditional LED lights sometimes finish cycles with immature plants that produce low yields. By supplying plants with only limited “beneficial” spectrums (pink light) from traditional LED arrays, you are essentially putting them into a permanent chill mode. Although this may produce healthy plants, they will not yield as much as plants under Spectrum King LED Grow Lights.
While HPS lights require over 1,000 watts to produce the intensity needed for healthy plants, Spectrum King LED Grow lights do the same using only 450 watts. This allows growers to save on electricity and benefit from lower ambient temperatures — which translate to less A/C usage and expense.
In a grow room, cleanliness is an important factor. Unfortunately, at times gardens can be infested with bugs and other insects — even soil and dust. Many of today’s LED lights have fans for cooling. But cooling fans also have a down side: bugs get sucked in and so does moisture from humidifiers and misters. The LEDs get covered with sticky “garbage” and over time lose cooling and even light performance.
Spectrum King LED Grow Lights are IP65 rated, which means they are completely sealed from dust and moisture and can even be washed with a garden hose!