What is the Difference between a PAR and R/BR Bulb?

PAR 20 , 30 and 38 and BR (or R) 20, 30 and 40 despite their similar names are quite different. Though they bear some similarities, understanding their differences will help you make better decisions about which one of these bulbs works best for your needs. They both share almost all of the same features that come with LED Light Bulbs, and therefore you only need to know the following difference between the two types.

 

How can I calculate how many Lumens to Kelvin?

Another common question we get is how do you calculate how many lumens = a certain kelvin. In short, these are two measurements that are not directly related. Kelvin is not a measure of brightness rather it is a measure of color temperature. If you are looking for brightness, the proper measurement to look for is lumens. In general though, 5000K or cool/daylight white will a appear brighter than 2700K all things being equal but this is due to the higher contrast of such light.

 

How Bright is 2700 Kelvin or 5000 Kelvin?

As we state in our "Watts vs. Lumens vs. Kelvin" article. Kelvin is not a measure of brightness rather it is a measure of color temperature. If you are looking for brightness, the proper measurement to look for is lumens. In general though, 5000K or cool/daylight white will a appear brighter than 2700K all things being equal but this is due to the higher contrast of such light.