rear light confusion

[jage]

Could anyone enlighten me as i cant for the life of me remember what the bulb is for.

Its the one next to the indicator bulb like to the left?

I've got, top row .............. Indicator
then bottom row Fog light Reversing light Tail/brake light

Just need to know what the missing one is?!

Im probably being dumb mind!

[Simon]

Top one next to the indicator is the reversing light.

[jage]

ah! So the one next to the tail/brake light is the other tail light? I know not all have two bulbs lit up there! Legend