emissive objects lighting only and we only see black in non Iray display

Caxar

Wnen I set the lighting with only emissive objects I disconnect all default lighting to avoid adding up to the scene.

But in this way anything that is not a Iray display will look black. The automatic camera headlamp needs to be off also or will affect lighting

Any solution other than  switch of-on continuosly the headlamp?

Fishtales

Ctrl/l on windows, Cmd/l on a mac.