Last month I bought an LED light bulb from Wal-Mart. It was a 1W unit, and I found it too dim, other than for use as accent lighting. I blogged about it, and readers had questions. Unfortunately, I had thrown out the packaging.
I got another one today, this one being 3.5W, with which I replaced the CF light bulb over our front door. So here is what the packaging says the LED bulb can -- and cannot -- be used for:
- Lasts 30,000 hours (about 6.75 years at 12 hours a day, as at our front door).
- Uses 3.5W (equivalent to 40W bulb), and so saves about $75 in electricity (after cost of light) over that time.
- Operates at temperatures as low as -20C
- No heat.
- No mercury (as in CFLs)
- Cannot be used with dimmers, timers, or motion-controlled devices.
- Not to be used with emergency exit signs (huh?).
- May cause interference with radio/tv/phones/remotes.
It looks likes we still need incandescent and halogen lights for many uses.