Of course they exist, they are just a bit less efficient than hps
When you have a climate limitation, I think an air cooled reflector is good thinking. Less light per fixture, yes, but also a lot less cooling capacity needed, and temperatures are already high so you don't need a lot of extra heat radiation. A compact air cooled reflector you can combine with plasma, specifically in a bigger room where you have a bit of distance to the plants. Mixing light in a small room is always difficult, but can be done to a certain degree.
I never said plasma was for blooming as is and I also never said it was more efficient than HPS in this whole discussion if you can remember
. But I tell you mothers and young plants love it and it's a great veg lamp stand-alone. In flowering in combination with HPS we have seen quality increase as one of the constant factors. That is something you will see come back in many of the grow reports of your peers.
The Philips 942 daylight Master CDM elite is a very nice 315W lamp, ideal for small rooms. The US Agro version of it is more efficient than a Hortilux HPS. I can imagine you can even air cool these, or have 2 in a 600W air cooled reflector. They require a special lamp socket and a suitable ballast of course, but that's what I would try to do. Wonderful lamps. Most important: Get the appropriate deep reflector for it. You don't want to lose a lot to your walls. Then if you want to experiment after a few grows to standardize your room : Add red and/or far red LEDs to see if you can optimize photosynthesis and morphogenesis, because your plants will stay shorter which can be a real disadvantage for strong indica influenced varieties. Far red can help you influence the R/Fr balance which influences (and induces) stretching of the crop. Vegetative growth under (partly) plasma for example can optimize that too.
So I think there are a lot of choices for small and big rooms in a warm or hot climate.