strobing

I've been meaning to post that I had picked up a blue LED Gemmy spotlight from Spirit Halloween. Brought it home and plugged it in to make sure it worked. It started strobing. And I thought wait, I thought I picked up a regular spotlight which the package is labeled as "Blue LED Spotlight". I...

Im looking to put and led on the end of a tube or wire and have it flash and strobe, like a flash cracker, for my sparking electric pole prop!! I dont know how to get the led to strobe though. Please helpp!!!! Thanks!!