For a long time the vast majority of DVD-R disks have been light-to-dark (ie, the laser writing to a spot makes that spot darker, not lighter.) Dark-to-light di

For a long time the vast majority of DVD-R disks have been light-to-dark (ie, the laser writing to a spot makes that spot darker, not lighter.) Dark-to-light disks were rare, the cheapest, and fell out of production pretty fast.