JK-Licht offers you a particularly sustainable service in Germany: old lamps can be disposed at a Lightcycle collection point. By disposing them safely, you are also helping to protect the environment, because over 90 percent of the components in old lamps can be recycled. You can find collection points near you here.
Lightcycle offers bulk collection points for quantities of one ton or more of old lamps. You can find a list of bulk collection points in your area here.