The lumen (lm) is the actual measurement of luminosity supplied by a light bulb, and is the number you should look for when buying LEDs. For reference, here's a graph that shows the watt-lumen conversion for incandescents and LEDs.
Deciding on the best color LED
You always have the option to count on incandescents providing a warm, yellowish tint. But LEDs come in a wide variety of shades.
LED lightbulbs are with the capacity of exhibiting an impressive colour range, from purple to red, to some spectrum of whites and yellows as shown off by the Philips Hue. For something similar to the light, nevertheless, you are likely looking for the dwelling that incandescents generate.
The popular colors available for LEDs are "warm white" or "soft white," and "brilliant white."
While bulbs tagged as vivid white will produce a whiter light, closer to daylight and similar from what you see in retail stores warm white and soft white will generate a yellow color, close to incandescents.
If you need to get technical, light color (color temperature) is measured in kelvins. Your typical incandescent is someplace between 2,700 and 3,500K. Look for this particular variety while shopping for LED lightbulbs for, if that's the color you are going.
You'll pay more for an LED lightbulb
LED bulbs are like hybrid cars: not more expensive to operate but upfront that is costly.
Don't expect to save buckets of cash, when changing to LED lightbulbs. Think of it. Luckily, competition has grown and LED bulbs have come down in price, but you should still expect to pay more than an incandescent.
Eventually, the LED lightbulbs will pay off, and in the meantime, you'll enjoy even the option of commanding them, longer bulb life, and less heat production.
Bottom line: unless you are replacing many incandescent bulbs in a house that is large, you will not see considerable savings in your electricity bill.
Watch out for non-dimmable LEDs
Due to their circuitry, LEDs are incompatible with traditional dimming switches. Other times, you'll pay somewhat more for a LED that is compatible.
Most dimmers, which were likely designed to work with incandescents, work by cutting the quantity of electricity sent to the bulb off. The electricity that was less drawn, the dimmer the light. But with your newly acquired knowledge of LED lingo, you realize that there's no direct correlation between LED brightness and energy drawn.
This guide explains when tied to your dimmer some LEDs will hum, flickr, or buzz.
When looking for LEDs, it helps to know what kind of dimming switch you've got, but if you don't understand (or would rather not go through the trouble), only search for LED lightbulbs compatible with standard incandescent dimmers.
Not all light fixtures should use LEDs
Knowing where it is OK to put an LED will ensure the lightbulb won't fizzle ahead of its time.
You probably know that LED lightbulbs run drastically cooler but that does not mean they don't generate heat. LED lightbulbs do get hot, but the heat is pulled away by a heat sink in the base of the bulb. From there, the heat dissipates into the atmosphere and the LED bulb stays cool, helping keep its promise of a lengthy life.