The new low energy LED lamps require a luxmeter suitable for the wavelength of the LEDs. This device is particularly well suited to low intensity measurements (<10lux)
Technical characteristics:

• Measure in 5 ranges from 40 to 40000 lux
  
• Resolution: from 0.01 to 10 lux
  
• Automatic or manual ranges
  
• Display: 4000 counts LCD
  
• Remote sensor with spiral cable (1.5 m) to optimally position it
  
• Functions: Max, Min, Avg, Hold
  
• 99 measurement memory
  
• Calibrated for light from white LEDs
  
• Measurements possible on incandescent or natural light
  
• Automatic shutdown
  
• 9 V battery power supply type 6F22
  
• Dimensions: 38 x 55 x 130 mm (housing) and 25 x 55 x 80 mm (sensor)
  
• Mass: 250 g
  
• Comes in a carrying case