For anyone that has worked in an office or classroom with flickering florescent lights, results of the Lighting can cause side effects that lower productivity and can make individuals' physically ill. A new environmental health study just released by Energy Focus, Inc. supports the need to exchange older lighting systems out for LED lighting that is flicker-free, green and just plain healthier to be around. Although the study looked at a number of factors affecting employee health and productivity, researchers discovered that 69% of workers complained most about health issues associated with elements of florescent lighting such as glare, brightness and excessive flickering.