Just received them today and two bulbs from a box. I've had 4-5 that looked like they were used and others were crystal clear. As for the bright light and durability, I won't be checking because I just put one of the clear ones in my salt lamp.
Pros
Wide Application: The light bulbs are suitable for most Himalayan salt lamps and baskets, chandeliers, candles and wax warmers, night lights, salt lamps, Christmas lights, chandeliers, Christmas decorations.