LED Olive can replace e.g. mercury lamps without having to bypass (NOTE! Does not apply to Olive Superb) the mercury driver as well as in fixtures where direct current is used (240V). If there has been a metal or sodium device in the fixture, you must bypass the drive device so that direct current is used. We do not recommend putting the light source in a closed fixture where the heat generation will be high (the life of the light source can then be shortened).