My boat has the switch which when pushed once turns on all courtesy lights in the cockpit using the clear (white) part of bulb. If you push switch again they all turn blue. Here is my issue. Only the blue part of bulbs are working. We cannot get the clear (white) part of bulb to turn on. I am perplexed. The same switch on panel is used to turn the lights on. Any ideas? I love the blue but sometimes you need clear bright light at night.