The K3 Series comes in four different variations: L600, L600Veg, L450, and L300. These full-spectrum LED grow lights are comprised of 3W diodes, running at 650mA. All of the products in the series have 2 cm aluminum heat sinks that remove heat much more efficiently (and silently) than fans. Also, all the models are equipped with “Secondary Optical Lens,” a technology designed to improve PAR and light penetration.
The L600 and L600Veg units are almost identical. However, the latter is designed to aid in the vegetative growth of plants by emitting more light on the blue end of the spectrum. At an extra cost, you can get a pair of glasses to protect your eyes from harmful UV lighting. The running temperature of these units is quite low, owing much to the heat sinks and LED technology. Overall, these grow lights are aimed at the intermediate-to-advanced grower. All KIND products are covered by a 90-Day Full - 3-Year Limited warranty.