This is a new lux meter, LX1010BS, which can measure up to 100,000 lux, approximately 5,000 footcandles. It's used for checking the level of luminance, luminance is a measure Digital Lux Meter Model: LX-1010BS Description: This is a new lux meter, LX1010BS, which can measure up to 100,000 lux, approximately 5,000 footcandles. It's used for checking the level of luminance, luminance is a measure of the amount of light falling on a surface. It is defined as: 'the density of the luminous flux incident on a surface'. It is the quotient of the luminous flux by the area of the surface when the latter is uniformly illuminated. - (E = df / dA). This convenient gadget is widely used in many areas such as construction, inspection, photography and etc. Specifications: Range:0- 2,000/20,000/100,000 Lux (± 5%+2D) Accuracy: 5.0% Resolution: 1 Lux Sampling time: 0.4 second Dimensions: Body: 4 1/2" X 2 3/4" X 1 1/8" Sensor: 3 1/4" X 2" X 3/4" Weight : 160 grams. Ligth Meter Lux meter LX-1010BS TLEAD à¤Ã×èͧÇÑ´¤ÇÒÁà¢éÁáʧ à¤Ã×èͧÇÑ´áʧ