... use 4, With Rohs and CE ♣Characters§ 3.5mm×2.8mm SMT LED , 1.9mm THICKNESS.§ LOW POWER CONSUMPTION.§ ... 20mAWavelengthCCTW 8000 KIf=20mAReverse CurrentIr 10μAVr=5VViewing angle 2θ1/2 120 DegIf=20mALife time 15,000 hrsI =20mA ... 8lm*Application:1. Interior automotive lighting ( dashboard backlight etc)2. Indoor LED display board,T5,T8,T10 tube, SMD ... , LCDs Key pads advertising.♣Work shop: SMD 3528 LEDs