I asked her about it awhile ago and she thought it might have to do with new, very reflective buildings that have been built near the Sheraton. Possibly causing all the light.
It doesn't seem to be more light to me-the Osler cam doesn't look any brighter. I suspect the aperture settings are off kilter-like when our team was tweaking the new cam to get better night vision-it sometimes didn't reset in the morning & the picture was overexposed. But I don't know if it's a camera adjustment, software, auto adjustment sensor...lots of things it could be.