400 watt hqi ts double ended ceramic metal halide lamp with an fc2 base a hqi ts lamp is a compact double ended discharge lamp with a high efficiency hqi ts lamps maintain stable colour over their lifetime and emit a crisp sparkling light hqi tss are frequently used in shops shop windows public buildings and offices they can also be used outdoors for floodlighting and pedestrian areas this hqi ts lamp is available in colours 830warm white and 942cool white boxe