Quite a new product in Amazon, although not the best product around, but for 13.99 for 10, it is quite good even if it lasts its warranty period. customers so far seem to be happy.
380Lumens, 4w, and quite a narrow beam width (not sure exactly by guessing 45)
Fulfilled by Amazon, so easily returnable and warranty administered.
Edit to respond to few questions some members have:
The bulbs have CE RoHS approval
380 Lumens is equivalent to 40 watt incandescent