Is it just me. . .

    . . .or is having water and ambient lighting in the same level rather. . .well. . .  Impossible?  I tried triggering water in this Race level I'm working on, so, you know. . .part of the race would be swimming.  However, once the water was triggered, the ambient lighting I'd previously set vanished.  Completely.  The stage was back to being very brightly lit.