Continuous light in the form of LED panels is increasingly becoming more accepted for use in a variety of photographic applications. LED panels can be a preferred approach to portrait photography, where their continuous light source provides the photographer with immediate results on composition, exposure values and the ability to efficiently control those elements.

I’ve been working with LED panels to create portraits for a while now, and I’m not sure I’d be comfortable going back to an all-flash studio at this point. – Kirk Tuck

Lighting setups with LED panels are simplified with their intensity control feature and the ability to incorporate diffusion materials and reflectors as effective control and modeling mechanisms.

From: The Portrait Photographer – LED Lighting: Professional Techniques for Digital Photographers by Kirk Tuck.