Night is indeed better than the day. Sadly, the spectral rods in our irises, not to mention some important glands, don't function properly when denied sunlight for an extended period of time.
Luckily for Jehuty, the tonic I gave him caontained genetic nanoengineers. In a few days, he won't need sleep, or sunlight, or such silly things as food, water, or air. His ATP will be produced using only a yearly gassing of Hydrogen, the most abundant element in the universe.
Have fun!
Zaijian,
Tiger