Based on that pic, it looks fine to me, man. Here's mine. I just cleaned and reoiled it so it hasn't been reinstalled yet. Held it up to the light...
Keep in mind, this is a single bulb ceiling light, not the sun as yours was photographed.
You're going to see light through there. If you couldn't, then air wouldn't be able to pass through! Just be sure to properly clean and oil the filter and you shouldn't have any problems. If your isn't physically damaged in any way, I wouldn't hesitate to use it.
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