System Information:
CPU: Ryzen 5 2600
GPU: RX 570 4GB
OS: Windows 10 Home

Blender Version:
Broken: Blender 2.8 Beta 26d5a3625ed

Short description of error:
In LookDev mode, enabling the shader option "Scene lights" produces different visual results even when no lights are in the scene.

Exact steps for others to reproduce the error:

1. Open Blender and switch to the 3D viewport and LookDev shading mode.
2. Create a 3D object and delete every light object in the scene.
3. In the shading tab in the 3D viewport enable the "Scene Lights option".
4. Notice the change in lighting even though there shouldn't be one.

If this is a feature, can someone explain why it occurs?