Information about swimming pool lights. Halogen vs LED which is better?
There’s no comparison LED are more reliable & better pool lights - Make the switch
For swimming pool renovations a surface mounted light is usually installed on the surface of the pool interior.
When installing new L.E.D lights into an existing swimming pool, it is far easier to use the existing lighting conduits, however a new light in a different location can be core drilled from the top of the pool down the wall, so new lights can be installed in different locations of an existing swimming pool.
Some older swimming pools still have 240v cable leading into the swimming pool! This is because the transformer used to be built in at the back of the light unit, meaning that while the globe may have used less voltage (like 36v) there was still a 240v cable sealed into the light under water! If you have one of these, do not try to uninstall it yourself, an electrician is required by law.
Fortunately LED pool lights typically use only 12V compared to a house (240V) and the new transformers now are normally installed near the pool equipment.
A pool light transformer is used to reduce the voltage from 240v to 12v. (Depending on your pool light)
Pool lights might use different voltages such as 36V, 32V, 24V, 22V and 12V, however most new LED lights are 12v, anything above 12v requires an electrician for installation.