The issue is the general public has to be dealt with at a very very simple level. Yeah if the driver is to hot there is a problem. And off the bat they are going to accept some responsibility. And more than likely warranty something one time. Then there is somebody like me and i'm going to know the driver is bad and have the proof. I'm going to check the voltage at the receptacle and panel. I'm going to know if I have a voltage drop depending on load,,, known as vdroop. I'm going to know what amperage the light is pulling at 0% dimmer, 25%, 50%, 75% and 100% dimmer. I'm going to know what the output voltage is going to be going to the leds or whatever the device is I'm powering. And now that I have a Apogee PPFD meter I'm going to know what my efficiency is. So I can evaluate the issue at a technical level. If it's a failure in their product warranty it. If I had a issue on my end I can ask for a goodwill replacement or maybe a reduced price on replacement. And in worse case scenario if I ruined the unit. How much for a new unit. I've been on both sides of the desk as a consumer and manufacture rep. Knowledge and honesty always trump's stupidity and gamesmanship. As a manufacturer's rep in the boiler, chiller, pump, blower and controls world almost all issues in the end were caused by the customer. It truly was alarming how people can destroy stuff and then have the balls to try and claim warranty. And that's with so called professionals in the trades and craft. And I'm not saying you are the issue because quality is dropping like a rock with all the China/India production thats complete and total crap.
As for the blowers it does not matter how much air over all you run through the enclosure unless your blower is drastically undersized. You will never get the enclosure cooler than the air temp your running through it. If the heat load is 80f in your tent and you have a 78f supply/lung room temp your fan is going to run darn near 24/7 to keep the tent from heat soaking. Or short cycling if drastically over sized. And depending on your AC/Heating system you could heat soak your lung room or home. Why would anybody buy a exhaust or blower fan that needs to be ran at 100% full speed to move the needed air when one can generally buy the next bigger size and move the same amount of air and be quieter doing it. Same with lights. There is a basic formula one can use to figure up min light size at 100% on the dimmer. Screw that old rule. Buy a light that fits the enclosure size and you have more even light distribution from corner to corner and wall to wall. If it's a more powerful light so be it. There is no rule in the rule book thats says you have to run the dimmer wide open at 100%. Turn it down, drop the heat load and cut back on wear and tear on the light. Heat kills electronics. You don't drive your car with your foot on the floor everywhere you go. Why run your exhaust fan and light at 100% matted on the floor.
And as far as tent material and reflection. If you size your foot print correctly reflection means next to nothing. White is the best reflector by many measures. But if your counting on reflection to improve lighting your already screwed. Because light does not reflect well until you start approaching hot spots. Photons die quick and trying to count on reflection property's kill them quicker. Thicker tent martials don't have a better R value or reflection properties. They generally come with tents that have better stitching, better zippers, better tent poles and corner parts. Just a more heavy duty unit.
Good Luck!