Lights in shaded viewports behaving erratically

[Mat Caird]

Hi All

I have 6 light objects used to illuminate the interior of my building. These lights are on their own class, and all the lights are set to 'on' in the OIP. They act as expected on the design layer as below;

 

I have created a sheet layer viewport (below), and the lights sometimes work, and sometimes don't. I have tried deleting and redrawing the lights. I have tried switching them on and off in the OIP. I have checked classes and layers, and all seems correct. Any ideas anyone? TIA

 

[Dave Donley]

Hello @Mat Caird Are your lights listed in the Visualization palette?

 

[Mat Caird]

Hi Dave, yes they are. FWIW I use classes to control the visibility of lights rather than the vis. palette.

Thanks, Mat

[Mat Caird]

Thanks to Jonathon Pickup, I think I discovered the problem;