LED with a wavelength of 390 nm as a monochromatic light source. Particularly suitable for student experiments in the field of optics. Suitable for the holder for apertures and slides 
45933 in 50 mm x 50 mm format with mini USB connection for power supply. The USB connection allows operation using a simple USB plug-in power supply 
459095 and USB cable 
459096. The non-interchangeable connection with fixed supply voltage via USB protects the LED from reverse polarity and overvoltage. Alternatively, the USB connection of the student power supply 
521488 or the USB power bank 
459099 can also be used for the power supply.