Dedicated infrared led for Monitor
There are three:
1, halogen bulbs + filter: far distance, power is larger, but the energy loss is big, because with filters, most of the visible light converted into heat energy by filtering, so this kind of lamp server time is very short, a lot of service issues;
2, laser tube: the farthest distance, but the Angle is small,
if  turned up the angle, because energy is limited, so distance is relatively shorter. Thus we can be seen that the laser tube is applied to the security industry is a very contradictory;
3, LED light emitting diode: it’s used widely, the serve time of single tube is very long (good quality LED tube factory nominal life as 100000 hours),but a big increase of led diode, the electric current is big, heat up, and server time will be shortened. At the same time, large current will cause a fire hazard. However, these disadvantages can be avoided. Infrared lamp LED products are divided into two categories, with and without red red explosive detonation.Have red detonation products using the wavelength of 850 nm infrared led
（ir led stip is probably the most commonly used）, in use, close observation, infrared light dark red light.   Without red detonation products using a 940 nm wavelength of infrared led,the infrared lamp surface without any light, so the more subtle.  The same camera, the 850 – nm wavelength of sensing it better than the 940 – nm wavelength to 10 times better.Infrared lamp has a higher efficiency, it should be the first choice as an infrared lamp.