Ultra Bronzing - 1600 hour life - Our best standard 100w bulb. Twice the life of a regular bulb at 1600 hours. Patented glass and phosphor mix. Delivers tans that are more brown, less orange. Slightly hot UVB and more actual bronzing than any other lamp, guaranteed. If you want your 14 lamp bed to perform like a much bigger tanning bed, this is the lamp to choose. Kit includes 14 lamps in size you choose.