I am now using lighted nocks for all thick cover hunting -- day or night.
Here is an example of the advantage:
At the last Trad Gang Laredo Tusk Hunt, I shot a javelina that we could not find. There were just a few drops of blood in thick cover. We went back after dark and Terry saw the nock glowing. The arrow was still in the dead javelina and he had not gone more than 30 or 40 yards total through thick cover. We would never have recovered that animal without the use of a lighted nock.
Of course, many, if not most, shots will pass through. But the occasional arrow that stays in might result in some recovered meat if I use a lighted nock. I see it as cheap recovery insurance in thick cover.
By the way, that Laredo Tusk Hunt cover redefines THICK. It is incredibly dense and everything has thorns.