Update TSW2000, you can customize brightness through your phone by connecting via Bluetooth with MarsPro App Control.(Insert iConnectu into dimmer box is not include, must be purchased separately) TSW2000 is one of our best-sellers as a home-use LED grow light, the perfect lighting solution for 4-8 plants. Affordable prices, intuitive yields, and available dimmer and daisy chain functions ensure scalability. Wattage - 300w Veg Coverage - 4'x4'(120cm×120cm) Flower Coverage - 3'x3'(100cm×100cm) The overwhelming choice for most growers is in grow tent, small room, cabinet & closet, and plant shelves. Please note: Due to a logo color update, this batch may include either a Silver or Green brand logo. Product functionality and performance remain exactly the same.