Well, this is a timely thread. My TSW2000 will arrive this week and replace a Viparspectra V450. I've never had such a powerful light (hence the 450) and can't seem to find the info I need or want concerning the dimming. Some say full on and adjust height and others adjust via the dimmer. I'm thinking (OK, it's still early and "thinking" may be a stretch) that the dimmer may be good for the first 7-10 days and then ramp up the watts and also being mindful of distance. Sound about right?