4K HD Wallpaper: City Lights. Budapest by Night
Gabor Mika is the photographer and from his courtesy the long exposure photo can be saved under CC0 license. Check it at full to see if you like and than download from here optimized for apply in desktop backgrounds, homescreen phones, blog articles, apps, social media, content marketing, webdesign projects...
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)