4000K low wattage metal halide lamps with ceramic envelopes: A breakthrough in color quality

New ceramic envelope technology is now also applied in 4000K lamps. Instead of quartz (straight or formed body) the ceramic material gives opportuniti es to better meet customer requirements. Elimination or reduction of intera ction between lamp filling and envelope material results in remarkable colo r control and maintenance. Design features of ceramic material will be disc ussed, and compared to features of fused quartz. Color rendering and control will be compared, and luminous efficacy and mai ntenance will be discussed. A comparison with ceramic 3000K lamps will be m ade. A discussion of the advantages of ceramic manufacturing processes will be p resented, and the influence on lamp properties.