greenhouse to the greenhouse

If I move my peppers (and tomatoes/melons) to a greenhouse, do I have to harden them like when you place them outside?
Or is it enough to wait for some cloudy days, so they don't get to much sunlight in the beginning?
The last two years I have moved plants from my germination room ( only fluorescent lighting) into my greenhouse without having to harden them. I do not harden them when they move from the greenhouse to the outside either.

You may have different results being at a more northern latitude than I am though. I know my greenhouse has a 78% light transmission, if you know what your light transmission % is that might be helpful.