yeah befour i discovered mylar i lined my grow room with foil i placed the foil on the wall so the dull side was showing then i placed see thru poluthene over the top so i could wash it down without damaging the foil the polythene has a shine to it too so that helps now i have pieces of mylar in the room in sertain spots that reflect the light back to the plant
the mylar is better than foil cause it has a 98% reflectabillity to it and its not that dear really
cheers all