Upgrading Old Concrete Pool Light to LED with Remote Control

Hello, I bought a house with an older concrete pool.  I light had a leak and was shorting out.  The fixture was not in a niche, it just sat in the pool inset.  It was a 500w halogen bulb.  The fixture was 60 years old.  What do you suggest I need. The opening is 10 inches in diameter and is 20 inches deep.  Do you suggest LED.  I would like to be able control the light remotely if possible, because the switch is down a hill about 50 ft away in a pool house.  The light wire only needs to be 8 ft…