Suppose I have a circular 22W flourescent light at home and I want to replace it with LED of similar brightness. How much wattage should this LED have? Any rule of thumb as guidance?
The salesman at the LED shop recommended me to replace 22W flourescent light with 22W LED. Can there be any energy saving if the wattage is the same?
Best Answer
A "22W" led bulb is typically rated as 22W incandescent equivalent. It would use only a fraction of that, likely 5 to 10 watts, and the light output would be similar. You can use the Lumens rating to compare the visible output of a bulb. A florescent bulb can also be rated as incandescent equivalent.
As to whether an actual 22W Led would be more efficient or not compared to an actual 22W florescent, it still would, in terms of how much of that 22W is converted from electricity to visible light instead of lost as heat.
Rule of thumb is incandescent produce 10 lumens per watt, florescent 50 lumens per watt, and led 75 lumens per watt.