Tunnel lighting itself?

Hi guys,
I’m working on my first ‘scene’ in Unreal Engine, using the current preview build (although I think this has been an issue from the start awhile back). Basically I have a section with an automatic flashlight that turns on. I got the flashlight working for the most part, but the tunnel section I want dark, well, isn’t. It’s weirdly illuminated despite a lack of lights in the area. Any ideas off hand, or suggestions for a fix? Initially I had it as a two sided object, then I gave it depth so that it was solid, I tried putting large blocks above and below the tunnel to block other lights, but nothing’s working. Any ideas? Thanks!

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Check if you have a skylight in your level. If there is, delete it or turn it off and see if it fixes your issue.