Bought four in the last two years. I use them in an outdoor wall light with a photocell. They are bright enough to illuminate a large area of the yard. I live in Texas where the summer heat is harsh outdoors and unfortunately these bulbs can't handle it. They only last about 6 months after turning on at dusk and turning off at dawn. In just 6 months of use they have cost me more money than I saved on electricity by giving up my mercury lamps. So I won't buy any more of these and will use LED bulbs now. My advice is not to buy it if you use it outdoors.
TCP CFL Double Circle Lamp, 200W Equivalent, Bright White (3500K) T6 Circline Bulb
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