The Life-Glo Fluorescent Aquarium Bulb is a normal output bulb with a color temperature of 6700 Kelvin and fits all suitable standard and electronic ballasts, Color temperature for fluorescent lights is assigned a value based on a human color perception that matches the color of the particular lamp, This fluorescent bulb features a premium tri-phosphor formulation with a high CRI value for both accurate aquarium viewing and superb photosynthetic support of plants and corals, The Life-Glo Fluorescent Aquarium Bulb delivers a balanced intense natural white light that mimics the mid-day sun and provides accurate color rendering, Glo T8 bulbs feature quality components and raw materials that contribute to a long lasting performance, Linear fluorescent T8 lighting technology offers excellent energy efficiency, The Life-Glo Fluorescent Aquarium Bulb Features and Benefits:, - Ideal for Glo T8 Lighting Systems, - T8 25 mm diameter bulb fits standard and electric ballasts, - Energy efficient, - Close placement to water surface offers the potential to maximize light entry into the aquarium, - High CRI values for accurate viewing of aquarium, - Low heat production, - Mimics the mid-day sun, - Stimulates the photosynthesis process in plants, corals and other invertebrates, - Perfect for all standard and electrical ballasts, 36"" length SKU: RCHG0500