I love Fellout by Hattix but even with their patches etc I could never get nights working properly and I ended up tweaking everything in FO3edit to bring nights closer to vanilla but without the green and leaving everything else true to Hattix's original mod. All credit goes to them, I just thought I'd share this version in case anyone needs.
Get the Fellout 1.23 ESP Update and DLC's if you need them too
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Other user's assetsSome assets in this file belong to other authors. You will need to seek permission from these authors before you can use their assets
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Conversion permissionYou can convert this file to work with other games as long as you credit me as the creator of the file
Asset use permissionYou are allowed to use the assets in this file without permission or crediting me
Asset use permission in mods/files that are being soldYou are not allowed to use assets from this file in any mods/files that are being sold, for money, on Steam Workshop or other platforms
Asset use permission in mods/files that earn donation pointsYou are not allowed to earn Donation Points for your mods if they use my assets
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File credits
Hattix
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Just drag this into your data folder. I know nothing about modding, I'm assuming any DLC patches made by Hattix will still work as intended but likely override any brightness changes made by this mod in their respective DLCs.
Update - Make sure you unzip the files if installing manually for them to work I've also added an optional add on for Point Lookout if you find Fellout to be too dark there too. Make sure these files are loaded after or override the original Fellout files in your load order.