TLHG440x/TLHO440x/TLHR440x/TLHY440x LEDs Vishay Semiconductors TLHG440x/TLHO440x/TLHR440x/TLHY440x High-Efficiency LEDs are housed in a Ø3mm T-1 tinted diffused package. The High-Efficiency LEDs feature a wide viewing angle that allows a high on-off contrast.