I have a gunite indoor pool which was built 1997. I have two old underwater halogen lights which keep leaking and attempting to replace the o-ring while replacing the halogen lamp bulb is no longer working. I had a pool contractor come out and look at replacing these but the general approach is to pull out the power supply cord and the fish through a new unit. The problem is that the way these were installed resulted in a very long power supply cord (~30 ft) so this contractor was not sure the approach would work. Does anyone have a suggestion of how to either repair or replace these under these conditions.