3D light settings file used by Adobe Photoshop, an image-editing program; stores the color, locations, directionality, and magnitudes lights in a three-dimensional space; can store point, spot, infinite, and image-based lights; used by Photoshop's 3D image-editing component to save and load preset lighting properties and add them to one or more 3D scenes.

Photoshop CS5 includes several lighting preset files which are stored in the /Presets/Lights/ directory. Preinstalled P3L files include: Blue Lights.p3l CAD Optimized.p3l Cold.p3l Dawn.p3l Day Lights.p3l Default Lights.p3l Fire.p3l Hard Lights.p3l Lush.p3l Mardi Gras.p3l Night Lights.p3l Primary Colors.p3l Purple Faze.p3l Red Lights.p3l White Lights.p3l