First, I thought it would be a waste to buy the Lightning connector version, since I can only use it with my iPhone. I decided to buy the micro USB version and the Apple micro USB adapter.
LED light and I like the effect.
How bright is it? It's not very bright. In indoor lighting, you have to pay attention to see it. But in the dark, it looks good:
I've actually used it to compare charging speeds of my Lenovo G580 laptop's USB port, and the Apple USB adapter that came with my iPhone, and the USB adapter charges faster!
Update 25 Sep 13
Ok it's true. The lights were flickering for a short while and now they don't work anymore. I only used it for less than 2 months. NOT RECOMMENDED.
Update 6 Nov 13