Review on Upgrade Your Lighting With Hyperikon 4 Foot LED Tubes - 40W Fluorescent Equivalent, Dual End Ballast Compatible, Clear Lens, UL/DLC Certified - Pack Of 24 by Keith Aluguvelli

I'm impressed. These are bright! Installation was easy if you have some basic understanding of wiring. I used push on connectors instead of twist on wire nuts, much easier and faster. Probably 5-8 minutes per fixture.I started with 24 of the 5000k to test and I hope to replace the other 400 bulbs in my facility as well. With a measured 40% reduction in power usage that will add up quick. I qualify for a $3 a bulb rebate for businesses through my power company so that makes it much more affordable. One of the easiest decisions I have made. ROI calculated out to 3.5 years.