On Fri, 2 Jul 2010 14:31:56 -0700, Terra Arcane wrote:

I noticed the water level inside the light fixture was half
way on one light; in the other three I couldn't tell so it must be 100%
full.

Correction: On the other two, it appears they were 100% empty of water.

Now that I replaced the gasket on the light that was (strangely) 1/2 full
of water, the GFCI no longer trips because the third light is now also
empty of water (kept out by the rubber gasket and tons of silicone goop).

It's weird that it was only 1/2 full (and not 100% full since the whole
light assembly is submerged) ... and I wasn't sure how tight to tighten the
steel band that holds the glass onto the rubber seal onto the steel light
fixture.

I made it VERY TIGHT but I was afraid I would shatter the glass. How do you
know when it's enough tightening on the two-inch-long bolt for the steel
band?