Most Par bulbs you find on Amazon, Ebay or even our competitors, simply use Red and a couple blue diodes. We fine tuned our spectrum to include 660nm Red, 620nm Red, 450nm Blue and 420nm Violet.  Hitting the wavelengths macro algae needs to grow. A huge improvement over standard Red/Blue bulbs and leagues ahead of 3500/5000K Home Depot LED Par bulbs.  With 12 3w diodes it is powerful for such a small package.  

The optional (Sold separately) goose neck is heavy duty with a built in on off switch.  Short enough to not be in the way, yet long enough to get the light high enough for good spread and color blend.  

Bulb is rated for 50,000 to 100,000 hours of use, so 5+ years with normal use.  Large heat sink with convection fins for cooler operation and longer life.