Yellow & blue wire from you ballast go to your bulb, white is neutral & black is hot on your ballast. The pigtail for your bulb should go like this, green to ground white to whichever lead (blue or yellow) that is the neutral on your ballast, then black to the hot wire off your ballast. be sure you use good watertight connections when doing this job. If you have any questions about your ballast, go the the IceCap website.
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