Shorty the 4 small RES we had in an aquarium (grandkids have them now and taking care of them till release time next spring in their newly renovated pond) sure did not like the light. Turn it on and they would immediately go into the covered refuge we provided. If the light was left on they eventually would venture out some but still spent a lot more time under cover than when the light was off. We left the light off most of the time for this reason. The BG and FHM didn't seem to do much when the lights came on but the RES went straight for the caves.
