PAR20 vs R20 lightbulb explanation and others to know which lightbulbs are right fit for which light sockets (Great for when you… | Light bulb, Led light bulb, Bulb
How to choose a BR30 LED lamp | Waveform Lighting
Comparing PAR / BR / MR Light Bulbs
BR20, BR30 and BR40 LED Bulbs - Open Lighting Product Directory (OLPD)