The pragmatic solution

High-performance HWL mercury mixed-light lamps operate on the basis of an yttrium-vanadate phosphor. HWL lamps can be used instead of incandescent lamps because they do not need either a ballast or an igniter. Fittings with high-wattage incandescent lamps can be easily upgraded.
Long-life HWL lamps from OSRAM can therefore a provide practical and economical alternative for lighting installations for factories and other large buildings.