Also known as Kolorlux,HQL,HPL,and HSL dependent on manufacturer.

These are are grossly underrated lamps in our opinion, mercury lamps have many benefits over other discharge lamps although "old" technology they are still good lamps.

The simple circuits,long life and a "soft" pure white light makes them very useful.

They are just as good indoors as out particularly lighting plaster ceilings and walls where the effect can be quite spectacular.

These lamps do run on control gear, but see the MLL section for mercury lamps that do not need control gear.