Night Pictures are printing to dark

Looks like a profile issue to me. Have you tried another profile or do you make your own perhaps?

 

Are you saving the photo as a Photoshop .tiff file and rgb?

 

May want to try taking photos during the day.

 

I agree with Vander - there's a definite color shift between the two. I also agree with JBest - how are you saving the image? What RIP are you using?

 

I would start by using a High quality JPG or a TIFF format with RGB colorspace. Is your monitor profiled? And how accurate is that profile? That will make a difference as well.
Then, besides the profile, there are a number of RIP settings that can make a difference. And a canned profile will never outperform a customer profile built on your RIP, RIP settings, printer, media in your environment. Until you're ready to make the investment in custom profiles, you're going to have to do a lot of experimenting till you get what you want for that picture. And the next picture may take different settings, so you may have to start all over again. There should be a tab in RIP and Print, or it may be once you have the job in production manager where you can tweak the colors.
Another trick is to open up the file directly into production manager, bypassing the design side of Flexi.

Good Luck

 

Since it's a photograph and you're using Photoshop, forget making a pdf file. Just save it as a photo file like a jpg or a tiff. Your RIP software will do a better job of handling the colors that way. Your end result has a lot more wrong than just being too dark--it's entirely different colors than the original photo.

All the comments about the profile for the paper being wrong are valid as well, but you may find that the result is far more acceptable, even using a canned profile, if you leave the photo in an RGB photo file type.

 

Save your file as .TIFF or JPEG at CMYK . I have experienced the same issue at PDF while I changed to TIFF and JPEG than it's solved.

 

In general, if you're not fully color managed, an RGB file will give you better color.