KIMJONGIL here is the thing...the foil is only reflecting heat and you said 35 celsius/95 fahrenheit and thats HOT!! What if you get rid of the foil, would all the light escape?

You want to get that fan on them sooner than later..it will make the stems stronger for when they have to suport the buds later. Just a slight breeze, just eough till it starts a little wiggle