My question is this: should I leave the grow light on 24 hours a day, even during daylight hours, or should I turn it off during the day? They do get sunlight during the day, but certainly not as much as if they were on my main living floor (but that won't work logistically, so the basement it is).
Neanderthals (or Neandertals) are our closest extinct human relatives. There is some debate as to whether they were a distinct species of the Homo genus (Homo neanderthalensis) or a subspecies of Homo sapiens.
Neanderthals only existed between about 130,000 and 24,000 years ago, and can be thought of as an early human adapted to harsh Ice Age climates. They were relatively short (average height 5' 5'' for males, a few inches short for females) but well-built. In fact, mutual exposure between Neanderthals and early modern humans may have contributed to the folk mythological notion of a dwarf.