how do i turn ies files upside down

[los]

Hello,

I want to make the lighting for a project where i need light coming from the ground pointing up. I want to use ies lights for that, but i don't know how to do that. 

Thank you in advance for your help

[Barry Kelly]

Select the light in 3D and you can rotate the arrow in the centre for the vertical direction.

Rotate in plan for the horizontal direction.

Barry.