Hi there, (sorry for my broken engrish) Maybe this might be useful. I was growing critical + (photo) from dinafem seeds over 1 year (clones only, SOG). I have a digital ballast and used dual spectrum hps's (250-400-600 watt) in a cooltube (80 cm x 80 cm tent). I was never growing something else than critical + (due to location problems i am not able to order seeds online) and cloned that one seed like there is no tomorrow. All i want to say, is, everything changed after i get osram ultra vitalux 300 watt uva / uvb lamp. On my last run, they were under 250/400 watt hps (cooltubed) (first 2 weeks 250 watt, than 400 watt until the end)+ osram vitalux 300 watt 15 min x 6 per day. (Its distance was about 30 cm (1 foot) to the plants.). I never smoked something like that before in my growing carrier. I have maybe over 20 runs with critical + under my belt (perpetual), but that one was the real killer. I never saw so much trichomes, the high was too much for me to be honestly. Sadly, i did not take any pics, but i am growing autos now and i will definitely take some pics. I think, i will get one more bulb for my second tray. The bulb is not getting hot (like HID's), but the area must be getting hot (i was never there when the lamp runs). I checked the grow chamber after the light goes out (uvb one) and i did not monitor any heat changes. (there is negative air pressure in the tent). I am totally pleased with that bulb and i will never grow without it. My clones did never get veg time and they always stand short (30 cm max donkey disks ) with or without uvb enchantment. I gave em just veg nutes (advanced 3 part ph perfect), some silica, white shark, canna rhizotonic, molasses and lots of aact. Coco Perlite hempy style. Info: Introduction: The Osram Ultra-Vitalux 300w E27 lamp is a self ballasted UVA/UVB lamp. These lamps are commonly used in Zoos to provide amphibians and reptiles with important UV radiation which they need to produce vitamin D. They are also used in some curing processes. Technical: UVA radiation 280-315nm 2.2W/m2 UVB radiation 315-400nm 5.1W/m2 Visible radiation 380-780nm 12W/m2 Electrical data: Nominal wattage 300.00 W Nominal voltage 230 V Lamp voltage 230 V Construction voltage 230.00 V Photometrical data Radiated power 315-400 nm (UVA) 13.6 W Radiated power 280 - 315 nm (UVB) 3.0 W Hope this helps. Peace, regen.