We have a sun room that is covered with the gray Suntuf material. Originally we had the clear but during the summer it was over 100 degrees in there and it leaked (and cracked in a bad hail storm) so we replaced it with the gray. It is cooler but still hot with the high temps we have had (100+). Here is a picture of our sun room, it looks really nice and things are not bleaching out. Oh and in the winter we learned our lesson by keeping all of our plants out there and our heater tripped the breaker and we lost all but one plant when it was in the negatives. It held the snow with now problem. Such a bummer with the plants, it is not a good insulator. The second time around we put in the wood closure strips and it has stopped the leaking. We also put silicone on every screw because of the leaking problems we had.
