Sorry, I didn't see your link until after I said you can't post pictures here.
What you have is not ivy at all, but pothos, Epipremnum aureum. The advice is
the same. Don't wait until it wilts before you water it. The 150 W bulb is
probably too hot & too strong. Keep it cooler. It does not need a lot of light.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)