I'm testing low wattage LEDs for my driveway and outdoor landscape since they're the bulbs that are on for the most hours of the day. They're on a "on at dusk, off at dawn" circuit and have been performing solid for 21 months. 5 watts total draw, with 4 bulbs each using 1.2 watts. They put out the light of a 25 watt incandescent, so I have 5 watts replacing 100 watts.
The leds I use are about $8 with tax, and are advertised to last 10 years (This is what I'm testing them for) and I think the 25 watt bulbs they replace are about a buck. Payback time is less than a year according to the above-mentioned LED ROI Payback Calculator at Patmullins.com.
Wal*Mart and Menards carry the Feit Electric brand bulbs I'm testing, labeled as "accent" bulbs. Feit has since come out with 2 watt bulbs (about double the wattage and brightness) which I'm now using a few indoors.
These lights have a nice 3000 kelvin color temperature. Other than being a little on the weak side for many purposes, I have not had a single issue with these bulbs. I've never had any die, dim, or discolor. They are also advertised to resist shock and vibration.
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