I have a Harbor Freight pond light that has been under my waterfall for over three years. It still works fine. I have it connected to a remote control switch, so I can turn it on/off from inside my house. I have a outdoor flood lamp on the same switch and the combination really lights up the pond at night.

I have 7 from various places, (including Harbor Freight) and they wintered just fine. No need to remove them. Mine are on a timer, and I disconnect the timer in the winter.
Don

I have no idea what kind of lights I have. They're on a timer and go off between 11 p.m. - midnight every night. They come on at dusk, as they have an electric eye which turns them on when it's dusk...regardless of time of day.

Lights are in the pond, plus at various places under the different waterfalls and placed throughout the streams. They run 365 days a year...I love seeing them in the winter under their weight of snow and ice. Very pretty!

Enjoy your pond in the winter.

The only caution is that ice build up might force the O rings out of place, allowing water into the housing. This won't kill your fix, cause the world to etc etc... Just might corrode the contacts in that fixture, and you might have to replace it later.

OK, If you have DC low voltage lights the above is true, if you have 110V lights, then you could do all of the above. But 110 lights are rare and built really strong.

Greg