High-performance, 54-watt fluorescent tube delivers a high output of 5000 lumens for approximately 24,000 hours. Rated at 3500 Kelvin, the T5-shape tube light radiates neutral light and offers a CRI of 85 and a miniature bi-pin base. Actual length is 48-4/5", but it is considered 48". Fluorescent tube is TCLP compliant and meets RoHS standards.