In the modern world, no one is surprised by the use of LEDs as a light source. The incandescent lamps used in everyday life, which practically did not undergo evolution throughout the entire period of their existence, at some point gave way to compact fluorescent lamps, and those, in turn, were relatively quickly replaced by LED lamps. Linear fluorescent lamps, which existed in parallel with incandescent lamps and were mainly used to illuminate public buildings and industrial facilities, also gave way to LED lamps.
The reason is very simple - the efficiency of the lamp and its service life. An ordinary household incandescent lamp converts only 5% of the power consumed into light, and the operating life of such an incandescent lamp is about 1000 hours, but the service life of incandescent lamps greatly depends on the number of on-off switches and the temperature at which the incandescent lamp is operated. A modern LED lamp has a significantly longer service life - from 10,000 to 50,000 hours depending on the LEDs used, is not afraid of low temperatures and frequent switching on, but most importantly, it consumes about 10 times less electricity than an incandescent lamp. For this reason, the energy-saving LED lamp has almost completely replaced other types of lamps.
But there are industries where a special type of incandescent lamps have been used for a long time - gas-discharge sodium lamps HPS. Electric arc lamps of this type were used for street lighting, at industrial facilities and as a source of additional lighting in greenhouses. HPS lamps have long been the optimal option for lighting plants that are grown in conditions of lack of sunlight and have proven themselves well, allowing to significantly increase the yield of greenhouses. HPS lamps have also begun to be used by enthusiasts of growing plants at home in so-called growboxes - containers completely isolated from external lighting, having various sizes and designs. For all their advantages, HPS gas-discharge lamps, from the point of view of growing plants at home, had several disadvantages. The first and most important is the relatively high energy consumption; in addition, HPS lamps become very hot during operation, which entails the need for forced cooling and the danger of destruction of such a lamp if water gets on its surface when watering or spraying plants.
Halogen and mercury fluorescent lamps, which are more economical than an incandescent lamp, nevertheless have a common drawback - due to the mercury vapor and other harmful elements they contain, such lamps cannot simply be thrown into a landfill; they require special disposal. LED lamps do not contain harmful substances and can be disposed of along with other household waste containing semiconductors and other electronic elements.