In a conventional lamp, the evaporated tungsten eventually condenses on the inner surface of the glass envelope, darkening it.

Chemical decomposition of LED chips reduces luminous flux over life cycle as with conventional lamps.

LEDs have several advantages over conventional incandescent lamps.

Aside from the method of coupling energy into the mercury vapour, these lamps are very similar to conventional fluorescent lamps.

The mistress, one of the more conventional lamps in her hand, had come forward to look too.

The experiment was unsuccessful and it returned to conventional electric lamps.

This avoids the necessity of using a hot wire thermoelectric cathode such as is used in conventional fluorescent lamps.

A brighter light results which contains more blue than conventional lamps.

Opium lamps differ from conventional lamps for lighting in that they are designed to channel an exact amount of heat upward through their funnel-shaped chimneys.

The overall bulb envelope temperature must be higher than in conventional incandescent lamps for the reaction to work.