A 5500K bulb that is ideal for freshwater fish and live plants. The Tropic Sun is a full spectrum daylight lamp, which simulates natural sunlight for optimum aquarium viewing. Our Tropic Sun daylight bulb brings out the natural beauty of fish and plants and is our most economically priced bulb. Zoo Med`s line of fluorescent aquarium lamps are made in Europe for ultra high quality, color, and longer burn life. Our energy saving T-8 sizes can save you up to $30.00 per year in electricity over the thicker T-12 size lamps! Effective up to 10,000 hours. Bulb Replacement Guide Bulb Types Life of Bulb* Normal Output Fluorescent 6-12 months Very High Output (VHO) 6-12 months Power Compact (PC) 9-12 months T5 High Output (T5HO) 9-18 months Metal Halide 9-12 months LED (non-moonlight) ~5 years (50,000 hours) * Manufacturer Recommendations All fluorescent bulbs have a 30-day warranty. Because fluorescent light bulbs are extremely fragile, they require special handling and packaging for safe transport. The special packaging we use for fluorescent bulbs accommodates multiple bulbs so the more you buy, the more you save. Bulb Handling Fees are Based on Order Quantity Bulb Length Less than 4 4 or More 6 or More ~24 Inch $10 No Handling Fee No Handling Fee ~36 Inch $15 No Handling Fee No Handling Fee ~48-60 Inch $20 $20 No Handling Fee ~72 Inch $25 $25 No Handling Fee