That is a small scale example but would apply to larger solar panels.
Please keep in mind that technology is changing rapidly and very little sunlight is needed to juice them up these days. Solar garden variety lights are inexpensive and probably not as light sensitive as their larger cousins.
References :
But the real solar energy is in the light, not the temperature. Hence, the PHOTOvoltaic cells that are a part of today’s solar collectors and panel. They say that solar energy can actually be collected at the North Pole as long as the Sun is shining.
References :
http://en.wikipedia.org/wiki/Solar_variation
http://www.greenwaysolarproducts.com/2010/04/solar-energy-for-the-home/
http://climate.gsfc.nasa.gov/research/solar_radiation.php