The Luxmeter FT6035 is used for the registration of the intensity of light according to a CIE-standard (Characteristics of human eye). The registered spectrum is in the range 0...100 KLux. The Luxmeter can be used in greenhouses, in open fields as well as in the buildings. The Luxmeter is very reliable with very low maintenance. By means of mechanical mounting, the sensor can be placed at various places of the plant grows. FT6035 has been fabricated according to the modern semiconductor technology. The sensor can be supplied with an integrated precision measuring converter with standard output signals 0…10V or 4…20mA.