The SS880 features 288 top bin OSRAM LED diodes and a unique supplemental "UVB mode" which is essential for developing a potent and flavorful harvest. The reason this unique attribute is so important is because the sun naturally contains large amounts of UVB and high pressure sodium (HPS) lights don't deliver any significant levels of this spectrum. This light employs two unique fluorescent UVB bulbs integrated into the fixture with a separate control. The supplemental lights are typically turned on during final few weeks or “finishing phase" of the flowering cycle to increase terpenes, essential oil production, and boost the potency of the final harvest. This incredible light was designed in America by growers for growers and has a large following of satisfied customers with track record of superior results. You can also expect outstanding made in America quality craftsmanship with a three year warranty.