I thought that body was a L30, and the L60 was larger to hold one more cell. I have, however, been wrong about these things before...
schiesz
L30, L60, L90 etc are Lamp Modules rather than individual components.
The L30 Lamp Module consists of a Z32 Shock Isolated Bezel, R30 Lamp Assembly and a Lamp Module Adapter Collar which allows it to be screwed into a WeaponLight Housing (such as an A21) or Adapter.
The single SF123A battery locates mostly in the Housing and partly in the Adapter Collar.
(FYI, the L31 is a Waterproof (tested) version of the L30)
The L60 Lamp Module consists of a Z32, P60 and a Lamp Module Body which houses one SF123A battery and the second SF123A is mostly housed in the Housing and partly in the Lamp Module Body.
(FYI, the L61 is a Waterproof (tested) version of the L60)
There is the L36 (L37 Waterproof) and L39 which feature the P60 and P90 lamps but the Lamp Module Adapter Collar rather than an L60 or L90 Lamp Module Housing Body. These are used when using an A15, A16 or A17 Adapter to offset the Lamp Module from the Housing.
Note that an L36+A12 is effectively an L60 although needlessly adding joints increases resistance and lowers output/reduces runtime.
Does this help?