The product description says 2500 lumens which seems too good to be true. 2500 lm / 40 W would be 62.5 lm/W, which corresponds to a light output of more than 9%, which I think is unrealistic for an incandescent lamp. I bought a pair anyway as they were cheap and they aren't particularly bright. The box says 288 lumens at 120V, which is just over 1% light output. I'll probably return them and buy LED bulbs instead.
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