Sorry for the late reply.
but I had to run the tank down to see (remember) where the light is located <img src="/forums/images/graemlins/lol.gif" alt="" />

Said light is located in the tacho (under the X in the X1000rpm text)

I have 2 lights located there (don't know what the second one does)

flickers orange when running low and then lights up (stays on) orange with about 5-7lt left.

Cheers