BH1750FVI Digital Light sensor module for an optical intensity sensor IC digital two-wire serial bus interface. Use of the light intensity data collection module can adjust the LCD brightness of the keyboard backlight. Resolution module can detect a wide range of light intensity.1, the outer diameter of 26mm, the large diameter edge 28.5mm, high 26MM (plus light beads) 2, the working voltage: DC5V2, the parameters3, Communication Interface: I2C. 4, the input light range: 1-65535lx. 5, spectral sensitivity characteristics: Peak Sensitivity Wavelength Typ: 560nm6, the light source dependence is weak: incandescent, fluorescent, halogen, white LED, fluorescent and can becolor: WhiteMaterial: metal + plastic1) I 2 C bus Interface ( f / s Mode Support )2) Spectral responsibility is approximately human eye response3) Illuminance to Digital Converter4) Wide range and High resolution. ( 1 - 65535 lx )5) Low Current by power down function6) 50Hz / 60Hz Light noise reject-function7) 1.8V Logic input interface8) No need any external parts9) Light source dependency is little. ( ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light )10) It is possible to select 2 type of I 2 C slave-address.11) Adjustable measurement result for influence of optical window( It is possible to detect min. 0.11 lx, max. 100000 lx by using this function. )12) Small measurement variation (+/- 20%)13) The influence of infrared is very small.Package Contents: 1* BH1750FVI Chip Light Intensity Light ModuleOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.