What's the difference between Ultrafire C8, C4, C2, U4?

[cpthk]

I found that Ultrafire C8, C4, C2, U4 have the same casing. Besides the LEDs are different, is there any difference between these models? And what's the difference between C series and U series?

Thanks.

 

[roadie]

the aphlanumeric are different too ...

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ok i go take alook den tell u ....

 

[roadie]

i think hor ... they are jus use for naming the lights .....

can u ask specific particular light as theres many many models around .....

 

[Tally-ho]

From DX's photos, they seem to all have the same external design/aspect but with different measurements (i.e.: head diameter & length, body diameter, etc)