UV-Light from 0 to 9 seconds by a small UV-lamp on each pot.1/4 Watt pr.sq.cm.
( 0 seconds for the one in the lower left corner )
UV-energy from 0 to 22 500 Joule / sq.m. Project by. Julie
Photo by Kaj Jensen one week after exposure to UV-Light.
Højbakkegaard January 1997 - The Royal Veterinary and Agricultural University.