Todays Project - What did you do today?

[TomG]

There is a 0 to 100 rating called the Color Rendering Index (CRI) that determines how bright a light looks to the human eye. The old T12 bulbs had a CRI in the range of 60, while the newer T8 bulbs have a CRI in the 90's. It is interesting that the CRI is unrelated to the temperature of the light source in degrees kelvin. Halogen bulbs for instance have a color temperature of 3200k, compared to 5000-6000k of sunlight, but they look so bright because they have a CRI of 90 (sunlight is 100 CRI). So if you want the most bang for your buck with any light source, look for a CRI rating of 93 or higher.

Tom