... 2. Unique heat dissipation, optics, structure, power design, pure aluminum, led temperature below 40℃. 3. 20% PAR and design idea ... yield per watt. 4. Cooling system: Aluminum shell, pure aluminum frame and sink, quiet fan make up better ... , garden, sowing, breeding, farm, flower exhibition, bonsai, garden, green house, sowing,breeding, farm, greenhouse cultivation, water soluble breeding, greenhouse ...