The Bublcam performs the same as any other 5MP camera sensor would in this type of darker environment, except it has no built in flash.
If you're not satisfied with an image in a low light setting, you can try to change the exposure by rotating the camera by 1/4 turn and then capture again.
Otherwise, you can also edit the image afterwards with post production software. See Editing Photos/Videos Captured By The Bublcam - Post Production for more info on how to edit images from the Bublcam.
Here are some examples of bubls in low light settings: