Pool lights are wonderful for anyone who wants to swim at night, and you can get some funky fiber-optic-style designs that turn your pool into a reflection of the stars above. That is, when the pool lights don't seem as dim as they did the last time you tried to use them. What's going on?
If your pool lights are looking less spectacular now, there are a few reasons to investigate. All of them are fixable.
Time to Replace the Bulbs
The first reason to look into is that the bulbs are simply ready for replacement. This is very likely the reason if one or two lights are dim but others are still bright. Note that if only one bulb is dim, you should not assume the problem is a bad bulb because there could be other issues -- it's just that the most likely reason is that the bulb itself needs replacement. Because replacing the bulbs usually requires draining the pool and opening up the fixtures, it's best to get a repair company to do the work, which is helpful because they can also check out other problems if the bulbs themselves turn out to be fine.
If the bulbs are fine, then you have to turn your attention to the wiring. Loose connections, corroded wiring, faulty power sources, and more can all make the lights flicker or shine less brightly than before. Because wiring problems can lead to shock hazards, never delay getting the lights checked out. Wiring problems can affect one or all of the bulbs.
Never try to fix wiring problems yourself, even if you have electrical repair knowledge. You want someone who has experience with pool wiring specifically to work on the pool lights.
One more possible cause is harmless, but it would affect all of the lights. If you recently had a new liner added, or you changed the color of the protective coating, that new color could be dark enough to make the lights seem dimmer than before. All you can really do in this case is have brighter pool lights installed. If you can't find bulbs that are brighter, there's not much that can be done except to get used to the new level of brightness.
Contact a pool repair company, like Heritage Pool Plastering, Inc., and have them check out the lights. Try not to use the pool until it's been inspected because of that chance that the problem is due to a wiring issue. Once the lights have been fixed though, you can get back in the pool and relax.