Hoya Starscape Light Pollution Filter for Astrophotography

Tried the filter on a very dark night so there wasn't much light pollution to really check the effects.

The filter seems to be fine but it does not do what I needed it to do. Unfortunately the street lights in my city are all very bright LEDs and at the time of ordering this filter I was unaware that LEDs emit all spectrums of light and thus no filter would work as it would have to block all light and so my photos might be a tad on the dark side. But now I have it in my camera bag just in case I am in a place that has traditional street lights or a non-LED porch light. This is through no fault of the filter; and in just daylight I cannot detect any color cast, so that is good.