An A19 bulb is your typical household light bulb. It is what you would think of if someone said "light bulb". An A21 bulb is very similar to the A19, only it is slightly larger in size. It's height will increase in size less than half an inch. Both bulbs are typically used for the same general purposes, however an A21 will give higher wattage options.
What LED wattage replaces my incandescent bulb?
The chart below will help determine your wattage equivalent:
|Incandescent Wattage||LED Wattage|
Color temperatures range from warm white to cool white.