You didnt share what your grow room looks like, care to share?
That 1 gallon fabric pot is going to limit your yield, but with 100 to 150 watts of light to choose from, I wouldn't worry too much about that for now. For future reference, three gallons is about ideal for auto's if you have the light to support a bigger plant.
While I have switched from HID to LED many years ago, I have never gotten rid of my HID lighting systems, and I will infrequently break them out for a grow. That said, neither 100W LED or 150W HPS is going to give you a very large footprint for a healthy plant canopy.
When I first started transitioning from photoperiod to autoflower plants, I purchased a 150W HID (Sun Systems if I recall) and ran it in a 2'X2' Secret Jardin tent. Didnt care for it; too much heat, other problems, not very good yield..
If you're growing in a tent, and your 150W HID is an integrated ballast / reflector like the one I used, you'll have challenges. But if you are growing in an open area where air exchange / venting is not a problem, dont be afraid to give it a try. An oscillating fan will keep your plant cool in an open grow roome area. Just keep your plant canopy area limited to one plant and no more than 1.5' X 1.5', or about 2.25 sq. ft.
You can grow some "pretty good" plants under 100 to 150 watts HID / LED, but bud density & yield are not going to be stellar. For example, I run a 300 to 325W LED in a 5 sq. ft. tent & get rock solid buds & yields averaging 10 to 12 oz. off a single plant. You just have to be sure you have a good ventilation system so as to not heat stress or light stress your girls.
I still like HID lighting if I get into an unexpectedly large plant with a thick, heavy canopy. I find I get better light penetration through the canopy, resulting in less loose / popcorn buds at harvest. But for normally sized plants where LST keeps an even canopy, I love my LED's.
