Vray lights help

Is there any control in Rhino or Vray that would disable lights (other than the enabled button)?
I have a rectangular light next to an object.
I set the intensity to 10 - it’s too dim.
I increase to 20 - same.
I increase to 5000 - same.
I have 3 rectangle lights and 1 point light next to the object - same.
Any thoughts about what could be causing this?
Thanks in advance if you have any ideas.

Also - the figures for Power in the control panel are weird.
The rectangular light lists power as 2782651392.003.

My client is flipping out

Spotlight intensity at 1

Spotlight intensity at 10

Crisis averted.
For some unknown reason, all my lights just came back on.
No idea why they were all off.