LED products for general illumination

Total energy savings (including more efficient light source, reduced consumption from occupancy sensors, reduced demand on the compressor, and reduced illumination levels) is estimated to be 2,659 kWh per year for a typical 5-door case. The reduction in illumination was pre-approved by the site in order to bring down the first cost of the installation.

Calculated simple payback from energy savings alone was approximately six years; maintenance savings were estimated to further reduce the payback to just over five years; and potential area rebates and tax credits could further reduce the payback period to less than two years.It’s said that, this LED lighting demonstration is one of many DOE Gateway demonstrations that showcase high-performance LED products for general illumination.

The proprietary GaN-on-Si technology was developed by Magdeburg, Germany-based Azzurro Semiconductors over the last six years. It enables the growth of thick and crack-free GaN-layers on silicon substrates with an excellent crystal quality and minimum bow, says Azzurro. Most led high bay light epiwafers are grown using sapphire or silicon carbide substrates as the starting material on which to deposit GaN-based multilayer LED structures. Wafer sizes range from 2 to 4 inches. The use of larger, lower-cost silicon substrates could lead to significant device-cost reductions, provided that high quality device layers can be grown successfully.