The model number shows this as a two tube ballast, but the wire count is a new one for me. I found the wiring diagram though and it makes sense after looking at that. Here is the label.that's exactly what I was doing just now. I have a model YC-322517E-2 ballast which is made by Jiangmen Pengjiang Yucheng Electrical Appliances Ltd Corp. It states that it's "Electronic ballast for fluorescent lamp, instant start, enclosed and potted, Type 1 outdoor, Class P protection". It has 4 blue wires, 2 red, and a yellow. Can I overdrive this for these two bulbs or will it only run one overdriven and two normal?