Lighting Question

[new_horizon]

Apologies, the information above is incorrect. The city scene has been created via the following...

import viz

#Initialize city
city = viz.add('euro_test19_opt_lite.ive')
city.disable(viz.COLLISION)
city.disable(viz.LIGHTING)
city.appearance(viz.DECAL)
city.disable(viz.DEPTH_WRITE, 'lanes')
city.disable(viz.DEPTH_TEST, 'lanes')

city.draworder(-3, 'ground')
city.draworder(-2, 'sidewalks')
city.draworder(-1, 'lanes')

How can I change the level of light within this scene? I am trying to create a spectrum that can range from night to dusk to day.

Thanks