light poisoning or light therapy,,,depends on the color(spectrum) of light the plant sees at night......at night in nature there is a shiny moon and twinkley stars so its the suns light that we see coming off the moon and stars right? so any growroom at night can have a bit of red to help the plant.-----like an infrared brooder lamp set up for a few on/off cycles through the night.-----i'v done it with a 150 W infrared brooder lamp and it works for more buds on ur plant.