Double-envelope, single- or double-ended Metal halide lamps

• · All types are UV-Block for reduced health and fading risks
• · Quartz discharge tube containing high-pressure mercury and a mixture of dysprosium, holmium and thulium halides (MHN-TD) or tin iodide (MHW-TD), with sodium and thallium added for colour correction and arc stabilisation
• · Double-ended lamps housed in a tubular clear UV-Block quartz evacuated outer envelope
• · Restricted burning position