Probably not much, but not nothing either, I think it's difficult to know.
If you have an Android phone, you could use an app to measure that, as most phones have a light sensor (to adjust screen brightness) and there are some apps (meant for photographers) that use it to measure the light in lux. The one I sometimes use is just called "lightmeter" (and it's free). There might be similar apps on iPhone.
Other than measuring with a tool like this I don't think we can really know, the human eye is especially bad at estimating illumination. But in any case... removing them won't do harm, so go for it, I guess?