User blog comment:Kguziak/Harrison/Reverse Flash/@comment-3430885-20150130000026/@comment-3481504-20150130090240

Admin TimeShade said: "Pretty much it seems all yellow suited speedsters give off right lightning and Barry is the only that has yellow lightning."

It's a fact that there's at least three different flashes out there, and the one who was battling the Reverse Flash in Barry's house emits yellow energy with his speed just like Barry. Seeing as how time-travel is going to be thematically interwoven into the show, there could be multiple yellow flashes out there, such as Wells and Eddie.