Greenhouse Shading & Light Requirement Calculator Greenhouse Light & Shading Calculator Your Plant Type: Low Light (Greens, Herbs, Ferns) Medium Light (Tomatoes, Cucumbers) High Light (Peppers, Strawberries, Succulents) Current Outdoor Sun Level: Extreme (Desert / High Altitude Summer) Bright Summer Sun (Standard) Partial Shade / Overcast Low Sun (Winter / Heavy Clouds) Greenhouse Cover Light Loss: Single Glass / Clear Poly (10% Loss) Double Poly / Standard PC (25% Loss) Dirty/Old Cover or Triple PC (40% Loss) Analyze Light Needs