Can I use a 60 watt led bulb that uses only 7 watts to replace my current incandescent 25 watt bulb? Never mind the lumens, it can be dimmer.....thanks.
Lumens Are What Matters
There are plenty of charts on the web. Using one found randomly as an example:
25W incandescent = 220 - 250 lumens
then searching Home Depot as an example, I found a Cree "25W equivalent", 220 lumens, actual usage 2.6 W.
So that will provide comparable light to a 25W incandescent bulb.
Keep in mind to always check before buying:
- Base size - E26 is "regular" in the US, E12 is "candelabra" and there are other sizes available
- Lumens - as discussed
- Color temperature - more important to some people than others and also matters more in some areas (e.g., dining room) than others (e.g., garage)
- Dimmable - if you are not using a dimmer, it doesn't matter. If you are using a dimmer then if you get bulbs that are not dimmer-compatible then they (a) likely won't dim reliably and (b) might flicker or blink or just be unreliable.
A 7 watt lamp should be fine in a 60 watt socket.
Watts are heat, 3.4 btu's per watt/hour. So 7 watts will put out less than 1/3 the heat than a 25 watt bulb. Some concern needs to be considered that the heat is dissipated differently from an LED than an incandescent element, so generally it is a good rule to not use an LED that uses more than half the watts an incandescent socket is rated for.