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  Frequently Asked Questions - Lighting Education

How is lamp diameter measured?
How can I determine the diameter of the lamp from
the lamp name or description?
 
What is color temperature, and how does
it indicate to the color of the light output from a lamp?
What is a foot-candle, and how can I calculate
it for lighting a room?
How is quality of light determined?
How is lamp diameter measured?
How can I determine the diameter of thelamp from the lamp name or description?
What is efficacy?
What are lamp BTUs?
What is the mean lumen output of a fluorescent lamp,
and how is it different from the initial lumens?
How Energy Saving Lamps can save your cost ?