We fitted a MarineBeam LED Steaming/Deck Light on the mast on our J/109 a year ago, and so far I’m impressed.
Small, light, relatively inexpensive, and amazingly bright, with incredibly low current draw.
Of course we don’t know how reliable it will be over time, but so far so good.
By the way, I have never used deck lights at sea. Too dazzling and disorienting, and, worst of all, our own bodies throw shadows just where we want to see. Much prefer, and recommend, head lamps.
The primary reason we have a deck light is to reduce the risk of someone running into us because they did not look up and see our masthead anchor light. Yes, it happens.