Dominant Wavelength 639 nm. Date Format DW:DM:M:Y. Lens Colour Clear. 2 x Kingbright 568 / 625nm Bi-colour Green & Red LED 5mm (T-1 3/4) Through Hole. LED Colours Red. Suitable applications for the HSMx-C110 Chip LEDs include; keypad backlighting, push-button backlighting, LCD backlighting, symbol backlighting and front panel indicators.