ive got 2x convoy c8
1 is the convoy c8 with bistroHD on TA fet+6+1 running a xhp50.2 the led switch comes on nice and bright 
happy days
the other is a convoy c8+
rampping driver (the driver has not so bad firmware ,i will keep as is)
the led switch is very dim . as i turn the tail cap closed (keep it open when in pocket or bag etc) ,it has a boost of light and then goes a bit dimmer
is this a know issue with the driver or?
The lighted switch only works with the “normal” Convoy UI as far as I knowm
+1
I do not know that driver.
Try putting a bleeding resistor in the driver.
In some drivers a 470R bleeding resistance has worked for me.
Or order a BLF-A6 driver for the C8, the lighted switch will work with it.
Or one of Lexel his drivers, he is from Germany, so shipping will be a lot faster, especially with the nCoV issues in China, half of the country is locked down