Really loving these underwater lights we incorporated into our landscape lighting. Allows for a different level of after-hours appreciation of our pond. However, they go on every night from 8-12PM. May be a coincidence but koi appear less eager to eat first thing in the morning as they did before (also had a series of severe rainstorms here in NY, however all water parameters within normal limits- PH 7.6, ammonia, nitrite, nitrate all zero- not sure if this played a roll). Anyone have similar observations? Do they need more sleep??? Thoughts?