Barry, did you set the headlights in concrete? That
wont float. Cut down half-gallon milk cartons,
set a headlight all wired up and siliconed inside each
one then
fill with concrete. When throughly dry, tear the milk
carton off and place the concreted lights in the pond.

HTH

Nedra
http://www.geocities.com/Heartland/Pines/4836
http://community.webshots.com/user/nedra118

"Barry" wrote in message
...
These things are so buoyant that after about a week in the water, it broke
the silicon seal and floated to the top. One is still underwater and
working, the other is still lit, but floating.