These give a slightly yellow toned light but do light well, equivalent to a 60 watt incandescent. Although not as hot as either a CFL or an incandescent bulb, they do get up to 145 degrees F at their hottest point (the heatsink). This is in an open fixture, ambient room temperature of 68 degrees with the bulb mounted horizontally and after being on for 2 hours. It is still early in the development cycle for LED bulbs so they still need to tune the light output, calm down the temperatures and get the prices ..
As a year-end 2011 project, I decided to upgrade many of our lights to LED -- primarily for energy conservation. This included recessed overhead can lights (kitchen, halls & bathrooms), general illumination lights (LR & BR) and reading lights.In researching which bulbs would appear to work BEST, I immediatley discovered a wide variety of "ratings" -- especially regarding brightness. From a technical standpoint the amount of light emitted is measured in "lumens" (wattage tells one only how much energy is us..
I have a bunch of these in service around my house and they're the best replacement I've found for a standard incandescent lamp so far. As an early adopter I paid $40 each for most of them but prices have recently dropped to $25 at Home Depot and will likely fall further as sales pick up. Better color than CFL, zero warmup time to full brightness, and they're not harmed by being switched on and off frequently, something that will kill most CFLs quickly and they contain no mercury so there is no disposal has..