The Company’s financial instruments that are exposed to concentrations of credit risk consist of cash, cash equivalents, trade accounts receivable and accounts payable. The Company places its cash and cash equivalents with high credit quality institutions. At times such balances may be in excess of the FDIC insurance limit.

Revenues from a group of related customers represented approximately 31% of the Company’s revenue for the year ended December 31, 2013. No customer represented more than 10% of the Company’s revenue for the years ended December 31, 2014 and 2012.

The Company made purchases from two suppliers representing approximately 14% and 10% of total net purchases for the year ended December 31, 2013, and four suppliers representing approximately 18%, 15%, 14% and 12% of total net purchases for the year ended December 31, 2012. No such concentrations existed during the year ended December 31, 2014.

A portion of the Company’s LEDs and LED lighting products and systems are manufactured by select contract manufacturers. While the Company believes alternative manufacturers for the production of these products are available, the Company has selected these particular manufacturers based on their ability to consistently produce these products per the Company’s specifications ensuring the best quality product at the most cost effective price.

The Company depends on these manufacturers to satisfy performance and quality specifications and to dedicate sufficient production capacity for finished products within scheduled delivery times. Accordingly, the loss of one or more of these manufacturers or delays in obtaining shipments could have a material adverse effect on the Company’s operations until such time as an alternative manufacturer could be found.