Osram hqi t 150w wdl g12 metal halide lamp with a g12 base single ended discharge lamps with a high efficiency these hqi t lamps maintain stable colour over their lifetime and emit a crisp sparkling light hqi t lamps are frequently used in shops shop windows public buildings and officeshqi ts can also be used outdoors for floodlighting and pedestrian areas this hqi t lamp is available in colours wdl warm white and ndl cool white product no974389