Li-Fi is gaining a lot of popularity lately, mainly because initial tests done in an office setting have shown that it is hundred times faster than traditional Wi-Fi. At the same time, it is also receiving criticism from the experts worldwide, some of whom claim that it will never be able to see the light of the day due to its major drawbacks. The skepticism and incomplete knowledge has led to the creation and circulation of a handful of myths. We’ve collected some of these Li-Fi myths and debunked them to give you a more factually correct picture of the technology.
1. Li-Fi Cannot Work in Sunlight
It is generally assumed that Li-Fi won’t be able to make it to the commercial market as it cannot work in the presence of sunlight. This statement is based on the knowledge that sunlight can cause interference, which consequently affects the speed and efficiency of Li-Fi. The truth is that use of optical filters will allow Li-Fi to work in outdoors without getting interference from any natural or artificial sources. These filters minimize receiver saturation. Analogue and digital filtering can also be used to minimize the level of interference.
2. Lights Flicker Will Cause Headache
The fact that Li-Fi works on a visible light makes some people believe that light will flicker to generate the speed that would result in frequent headaches. While light will indeed flicker to generate the speed, this won’t affect us as the speed with which it will flicker cannot be detected by the human eye. What those who have bought this myth do not know is that TV and computer screens also use flickers, but we are never able to notice this. This is exactly what will happen with Li-Fi.
3. Dependence on Light Makes this Technology Inefficient
Li-Fi uses visible light communication to transmit data. This means that it requires light to work properly and therefore the light bulbs need to remain switched on all the time. This is fine in commercial settings where you need the internet only during the day time when the place is occupied and lights are turned on. But this is not possible at home as people usually keep their lights switched off during the day to save energy. As a result, the technology is believed to be inefficient by some. The truth is that Li-Fi is not fully dependent on light. It works perfectly in dim light. Even the minimum level of luminescence can get the technology working, so you won’t be able to notice that the light is switched on.
4. It Requires Line-Of-Sight
The line-of-sight is an advantage, not a requirement. Li-Fi will work more efficiently in the presence of the line of sight, but it won’t stop working in its absence. Li-Fi can work as long as the VLC (visible light communication) can gather photons. Dimmed light will only result in lower data rate. This is hardly something unusual as Wi-Fi speed also decreases when radio waves experience interference.
5. It Needs Special LEDs to Work
Some people claim that Li-Fi technology is not feasible as it works only if you have special LEDs. This is not entirely true. The use of special communications devices is an ideal thing to do. However, a solid-state LED and ordinary lamps also work perfectly.