Finished the install of the new SR Smith Kelo lights in the non-threaded 1.5" fittings used for my old ColorLogic 320s, and actually it turned out to be a pretty good fit. The Kelo light sit flush against my pool wall and the back side of the light slides a bit into the 1.5" fitting so the light fits nice and snug- even though they re not screwed into the fitting. I drilled 2 small holes into the 1" conduit on the side where the conduit pops up in my lawn (above the pool water level). I pushed a zip tie through the 2 holes to keep the light cable taut so someone in the pool cannot pull the lights out. I saw some other comments on this board, but important to lube up your new cable before pulling it thru the conduit. I spent hours trying to get the new cable thru and ended up severing my pull cord. Back to the store for a 50 ft fishtape to run another pull cord. After lathering the cable with Ideal yellow/gold lube, it slid right thru my 30 and 45 ft conduits runs.