Changing a light bulb in a swimming pool can be a little daunting because the lights are often 60 centimetres or more below the surface of the water. If you were to let out enough water from a 10 meter x 5 meter swimming pool to work on the lights above the water level, you would have lost more than 30 m3….. yes thirty!… cubic meters of water which would have to be replaced, hopefully not from a metered supply.
There are plenty of sites on the internet offering advice on how to change your bulbs or sealed lighting units, with many offering LED lights and lights with interchangeable colours and even remote control.
Bulbs inside pool lights (not LEDS) are normally powered by a 12 or 6 Volt supply. If you find that a bulb has blown it’s advisable to change them both (normally two lights in a swimming pool) The bulb that was not broken will be put under extra stress due to its partner not working so will no doubt break very soon after you replace the water!
I will not be fitting or upgrading to LED lights in my swimming pool. I have found that its true you do have light longer than an ordinary bulb but LEDs can and do break. Where you once had a collection of 6 LEDs all lit at once you start to see a dimming in some lighting units as the LEDS die. The one or two remaining LEDS are not powerful enough and the contrast with the fully operational LEDs will make you want to change them anyway.