PHILIPS 378547 40 Watts T12 FB40/SPEC35/6/ALTO U-Bend 6'' Leg Spacing 22.5'' Case Of 12 Light Bulb 2775 Lumens 18000 Lamp Life Hours 73 Color Accuracy (CRI) 3500K Color Temperature Warm White MOL (in) 22.5" , 6" Leg Spacing Medium Bi-Pin (G13) Base