What's the difference between led bulbs?

Energy-saving research data show that because LED is a cold light source, semiconductor lighting itself has no pollution to the environment. Compared with incandescent lamps and fluorescent lamps, the energy-saving efficiency can reach more than 90%. At the same brightness, the power consumption is only110 of ordinary incandescent lamps and12 of fluorescent lamps. If LED is used to replace 50% of our current traditional lighting, the electricity saved in China is equivalent to the sum of the annual power generation of a Three Gorges power station, and its energy-saving benefits are considerable. Health LED is a kind of green light source. LED lamp is driven by DC, without stroboscopic; Does not contain infrared and ultraviolet components, has no radiation pollution, high color rendering and strong luminous direction; Good dimming performance, no visual error when the color temperature changes; The cold light source has low calorific value and can be safely touched; These are beyond the reach of incandescent lamps and fluorescent lamps. It can not only provide comfortable lighting space, but also meet people's physiological health needs. It is a healthy light source for protecting eyesight and protecting the environment. At present, a single LED is not suitable for single use because of its low power and low brightness. However, assembling multiple LEDs to design a practical LED lighting lamp has broad application prospects. Designers of lamps can decide the shape of optical system, the number and power of light-emitting diodes according to the requirements of lighting objects and luminous flux. It is also possible to combine several LED tubes into a "secondary light source" of a point light source, a ring light source or a surface light source, and design lamps according to the combined "secondary light source".