What does "Par" denote contained by flood lights? example: Par30, Par38? I just installed buoyant fixtures that use floodlights, and don't know what...

I just installed buoyant fixtures that use floodlights, and don't know what the "Par" means as surrounded by Par30, Par38. Does it mean the nouns in covers?!?
What should i expect to wages for tub...
Answers:    PAR is an outside rate light bulb - R is an indoor rate light bulb.

PAR30 = outdoor flood bulb (spot light)
R30 = indoor flood bulb (recess can)

The number after PAR refers to the diameter of the bulb. PAR30 would own a 3-3/4" diameter. I verified several PAR sizes.

Parabolic Aluminized Reflector is actually the description of the light or bulb that goes inside a PAR can. The can is the container where on earth the PAR lamp or bulb go. The number beside PAR is a measurement that describes the diameter of the PAR storm lantern or bulb. To figure out the diameter, divide the number subsequent to PAR by eight. For example, if you have a PAR64, divide 64 by 8 and you will own an 8-inch diameter lamp. PAR56 have a 7-inch diameter lamp, and PAR46 have a 5.75-inch diameter lamp, and so on. The diameter of the PAR hurricane lantern is useful to know when order a replacement lamp."
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