LDR & Light sensor

BH1750 module is a digital ambient light sensor, IIC I2C communication. Good for arduino light detection. It is a  light intensity sensor breakout board with a 16 bit AD converter built-in which can directly output a digital signal, there is no need for complicated calculations. This is a more acurate and easier to use version of the simple LDR which only outputs a voltage that needs to be calculated in order to obtain meaningful data. With the BH1750 Light Sensor intensity can be directly measured by the luxmeter, without needing to make calculations. The data which is output by this sensor is directly output in Lux (Lx). When objects which are lighted in homogeneous get the 1 lx luminous flux in one square meter ,their light intensity is 1lx. Sometimes to take good advantage of the illuminant, you can add a reflector to the illuminant.So that there will be more luminous flux in some directions and it can increase the ilumination of the target surface.

This is GYML8511 Analog Output Ultra-Violet Light Sensor Module. The GYML8511 module is easy to use the ultraviolet light sensor. The GYML8511 Sensor works by outputting an analog signal in relation to the amount of detected UV light.

LDR(Light Dependent Resistor) also known as photoresistor is a resistor whose resistance varies with the amount of light falling on it. This is a large size LDR with a size of 12mm.