They aregreat lights. But if you decide to use them outside, the outside of the casing of the bulb can discolor. I live in South Florida, it doesn't rain too much during Christmas time but the few times that it did during December caused the stem of the snowflakes to discolor (kind of brownish). Now this is the first time I've tried to decorate outside so maybe it's normal. But, I will only use these outside for now on. The other set that I used inside did not discolor and I plan on keeping themSee full review