Underwater pool lights traditionally use a mains/12v transformer which offers isolation from the earthing system. Older halogen lights were 12V AC powered which also made sense to install a transformer.
Newer LED lights however sometimes need 12V DC supply. Instead of just adding a rectifier (and hence the output would be unregulated 12V*sqr2) I am thinking of replacing the transformer with a regulated SMPS 12V DC like this one. I am puzzled however regarding the safety of this power supply regarding mains isolation even though I know these also employ a transformer at higher frequencies.
Does anyone have any experience?