We’re flexible. LightRocket is your tool, so feel free to upload files of different sizes and types. You can upload pretty much anything including photos, videos, audio files and PDF. If you find a file type we don’t support, let us know and we’ll do our best to help out. This being said, we place importance on promoting the LightRocket archive to the thousands of picture buyers in our client database. If you wish to license your pictures for publication we recommend uploading files of not less than 3000 pixels at the longest edge. Jpgs are ideal. They are of sufficient quality for publication while remaining small enough for convient delivery.