These should interest you. Currently looking at doing a chase around the arch for a theatrical production. The manufacturer will make them further allow this.
http://www.aliexpress.com/store/product/10pcs-Lot-RGB-LED-Pixel-Lamp-Two-years-Warranty/206373_503324346.html
Came across these last year and purchased a string of 20 to try them out. Looking a using them to create a 3 circuit chase in a theatrical production controlled directly from the lighting desk via a DMX decoder. They are very bright and the size is a direct replacement for a standard 25w round...