I my self have a 1000 light and have just turned to the flowering cycle. My light is a air cooled tube light and able to get it within 4" before dryes leaf out. Becouse of this was able to keep light closer to the plant so would not streach out but remain shorter and bushier. When I first started lost two plants but that was becouse the ph and ppm to high. Started monitoring both a few times a day and since then going a lot better.
Her a pic just before going to flower.