Budget pure thrower. Size not an issue

Does the extension tube for the c8 add any power or just runtime? Thinking I might get a convoy c8 and an extension tube so I could have a hand held light or have the option of mounting it if I decided to.

Be careful with that, it cranks up the input voltage which is needed for LEDs that require higher voltage.
The standard driver and led setup with xpl hi and sst40 and so on cannot handle those voltages

How do I know if i have a xp reflector?(this might be a dumb question)