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4" Recess Can Light Bulb Options

What you need to know

In most cases a 4 inch recess can uses a 2 or 2.5 inch diameter bulb. There are a few option that include R20, PAR16 and PAR20 light bulb. You need to make sure you know if the recess can you are using has a trim bezel that is designed to use a 2 inch in diameter bulb (PAR16) or a 2.5 inch in diameter bulb (R20 or PAR20).

4" Recess Can Most Common Light Bulb Options

R20 Incandescent </br> Light BulbsR20 Incandescent
Light Bulbs
R20 light bulbs are 2.5 inches in diameter and 3.95 inches in length. The bulb part of the light is one continues piece of glass until it meets the base. It is designed for indoor use all though it can be used outside if it is in a protected fixture.
Halogen R20 </br> Light BulbsHalogen R20
Light Bulbs
Halogen PAR16 & PAR20 </br> Light BulbsHalogen PAR16 & PAR20
Light Bulbs
R20 Fluorescent </br> Light BulbR20 Fluorescent
Light Bulb
LED PAR16 & PAR20 </br> Light BulbsLED PAR16 & PAR20
Light Bulbs
4" Recess Can</br> Retrofit Kit4" Recess Can
Retrofit Kit

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