You are looking at purchasing a flood or spot light bulb for your recessed or track lighting. But when you get to the time to make a decision, you are looking at light bulbs that are named: PAR16, PAR20, PAR30, R30, R40, etc. What does all this mean?
Basically, you take the number and divide it by 8. Once you get that number that represents the diameter of the light bulb. That is a crutial number to know. You should purchase a light bulb that is about 1″ less in diameter than the can you are putting it in. Or however small it needs to be for you to screw it in and take it out. So, a R40 is 5″ in diameter and a PAR16 is 2″ in diameter.Holly Eddins
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