We have a mixture of colors around our shop. Mostly 4100K, and 6500K. We are now switching to 5000K, and I immediately noticed that it more closely matches light coming in from outdoors at noon. The 6500K look more bluish than the outdoor light.

Also, we cary T8 4500's. I'm in an office high rise and we have large retail/mall area on street level and two levels above street. So, it's my guess that our 4500s are used in the retail areas after watching this vid. Thanks for the info. It helps a lot. -steve, building engineer, california

Thanks for the informative video I had no idea the T5 were such high intensity

The "K" is for Kelvin. It's the color temperature of the bulb..

whats the best and most economical for growing freshwater aquarium plants? thanks.

Is there a starter or fuse. How to replace that

which has more lifespan T5 or T8 LED tube lights?

Which is suitable for bed rooms