Display items from your Flickr photostream or entire sets/galleries along with your WordPress content.
The Flickr Field will grant you the ability to include photos, sets and galleries from your Flickr account. After selecting which image formats you wish to use the plugin will generate the flickr image urls. This plugin is an add-on for the Advanced Custom Fields WordPress plugin (v4 and v5).
See the installation and/or screenshots tab for more info.
Looking for a clean and very easy to setup lightbox? I recommend Easy Fancybox: http://wordpress.org/plugins/easy-fancybox/