PHILIPS (Case of 12) 219931 - FB40 / DX / 6 - Full Spectrum 6500K - CRI 84 - U-Bend Fluorescent - 6 in. Spacing (Case of 12) Philips 219931 - FB40 / DX / 6 - Full Spectrum 6500K - CRI 84 - U-Bend Fluorescent - 6 in. Spacing