Sine.Spaces uses Deferred rendering. So you can use as many lights as you wish.
Below is the Unity5 documentation for scene lighting. It's a bit long but worth the read.
Here is a video on the basics of light.
Baking Your Lighting
Precomputed Realtime GI
Baked GI Setting
Select the Baked option under Ambient GI drop-down box.
Set your Baked Resolution between 8 - 15, the larger the scene the lower the number here.