These are low pressure lamps for general disinfection (254 nm output), GREEN base, 9,000 hour life.  

Dimensions

L210 - 8.7" (221mm)

L290 - 12.0" (305mm)

L420 - 16.6" (420mm)

L470 - 19.1" (486mm)

L820 - 32.9" (836mm)

L850 - 34.1" (866mm)

L999 - 39.3" (999mm)