My last set up was a 430 watt HPS dual spec bulb and a 150 er LED. Had a massive 7 foot WhtWidow phenotype that was huge. Heat was too much in the 5x5. New setup, electric sky 300 watt LED replaced both previous lights and has a dimmer that I’ve yet to put over 50%, wish I bought two, heat is steady at 77 all year now, oil heater needed in the winter up here in CA