What are the main advantages and disadvantages of different lighting for reading?

Question

was wondering if there's any particular lighting that is better for illumination, eye strain, headaches, color of light, etc. Do some lighting sources flicker, causing eye strain? I'm wondering about incandescent, compact fluorescent, and LEDs, natural light, and candlelight. Seems natural light would be the best... however I do sometimes find it difficult to read outside on a really bright day, so maybe not. I also see an advertisement for Tensor brand full spectrum light, but I don't know what kind of bulb that has.

Answer 1

Best Answer - Chosen by Asker

The best light source is one with a high CRI (color rendition index) value. A high CRI value produces the high contrast needed for task situations such as reading. Fluorescents typically have a much higher CRI than incandescents. LED's, which have a high CRI, are also being developed for task lighting.

Avoid glare, such as being in direct view of a light source or light bulb when reading. If you are using light from the window to read, then read with your back to the window.

Source(s):

17 years in electrical engineering/lighting design

Asker's Rating:

Asker's Comment:

Both answers were good, but I'll go with this one on account of it addressing the question more specifically. Thanks for the links on the other answer, it was interesting to read the developments on LED lighting.

Answer 2

A white light is usually best. Low voltage lights are good candidates for reading. Incandescent ones are good but incredibly inefficient. LEDs work for some people. These links should give you some good info.

Source(s):

http://homerenorepair.suite101.com/artic…
http://home-electrical.suite101.com/arti…
http://homerenorepair.suite101.com/blog.…