What Is R40 Light Bulb?
What Is R40 Light Bulb? What are R/BR40 Bulbs? Reflector (R) or Bulged Reflector (BR) 40 bulbs have a reflective coating on the inside of the bulb that directs light forward. … Like all light bulbs, the 40 value represents the diameter of the bulb in 1⁄8 of an inch. Therefore, a R40 is 5