For rooting cuttings normal light is all that is needed. I have not measured but would guess that 500 to 1000 foot candles would be enough. Your grow light should provide that much. Al

If this 'chamber' is fully enclosed and sealed to prevent evaporation, it should never be put in direct sunlight. Temperature buildup will kill your plants. Most of the plants you list are fairly easy to propagate, and the enclosure should improve your success rate.

Here is a link that might be useful: Vegetative Propagation of Houseplants - Procedure List

Last year I used this very simple system to root gardenia cuttings. I filled 8 ounce plastic cups that had 3 or 4 small holes punched around the bottom with cheap potting soil. I trimmed the cuttings to 2 or 3 leaves each and cut the bottom at a diagonal. I then dipped the ends ina roooting hormone and stuck them in the cups. For a chamber I used plastic Tidy Cat kitty litter tubs (the ones that look like square pails). I could fit 8 or9 cups in each pail. I poured in a 1/2 inch or so of water and covered the pail with a white plastic kitchen garbage bag. I put the pails on the patio where they got indirect light and only checked them maybe once a week or so to add a little water if needed. I'm not sure if gardenias are super easy to work with but I had an almost 100% success rate.
I'm trying the same thing this year with some Japanese magnolia cuttings that I started to throw away when I pruned.