I haven’t really done a thorough search for the strongest wattage for LED bulbs. However, the highest wattage I’ve seen on one is 13 watts. This was on the (esthetically displeasing) EvoLux S 13 Watt LED. I haven’t tried it myself, but the manufacturer claims it gives out as much light as an incandescent bulb at 100 watts. It’s also quite pricey. Then again, if it does last as long as claimed, you should recoup the cost and save a decent amount on the total life of the bulb.

A more affordable alternative is the Designers Edge L-611 6 Watt LED bulb, which is designed to replace 25 watt and 40 watt incandescents.

The tricky thing about these comparisons is that the technology is different and can’t really be compared directly. An incandescent bulb will always draw what it says on the box, give or take a tiny percentage. It’s simple technology, and has no hidden or semi-hidden loads.

Now, for CFLs and LED bulbs, things aren’t always that clear-cut. Both of these bulbs have some components that emit light, as well as some components that enable the light-emitters to do their stuff. (For a closer look at the difference between the different types of bulbs and tubes, have a look at Light bulbs: from energy waste to energy saving).

Both of these component types draw power. Regrettably, on some LED bulbs only the power load of the former type of components are listed on the box. Which means that the actual electricity use might be higher than what it says. This is, not surprisingly, more common on cheap bulbs.

A good example of this is the LED bulb I have in my refrigerator. The packaging and the bulb socket says it’s a 1 watt bulb. Which is probably true, if you look at what the actual light emitters (LEDs) inside the bulb draws. However, when I plug it into my trusty energy meter, it’s displayed as drawing 4 watts. Which means the control circuitry draws 3 watts – 3 times more than the LED. Which kind of sucks. Then again, this was a dirt-cheap bulb (about 6 US dollars, the brand is NorthLight), 4 watts is still fairly low and it gives a fully adequate amount of light for my refrigerator.

More expensive bulbs from reputable brands typically list the whole actual power draw of the bulb in operation.

Question :
What is the strongest wattage on LED bulbs and what does it compare to with CFLs and incandescent?