i also read above some growers like spraying there girls lights on i would definitely say DO NOT reason being water droplets will form on leafs more or less magnifying the light causing burns and other issues on your leafs think of your grow room as mother nature in early mornings dew is formed out side as sun comes up its evaporated now to have 1000 watt turn on the water molecules dont have enough time thus causing burns outdoor you got few hrs before peak sun indoor you got 15 mins before peak