Lightcell: An engine that uses light to make electricity

My initial thought about this was that it's using fuel to make electricity, right? Rather than using sunlight/hydro/etc -- kinda like a generator, but without the mechanical aspect?

To my limited understanding yes, that's what they claim.

Basically burning fuel (any fuel, really) with added sodium to create very bright monochromatic light that can then be converted into electricity using very high efficiency solar cells.