SMD LED help

[rockpopandchips]

So I orded some of these very small LED didn't quite expect then to be so small, I ordered 20 pre-wired but the first few out the bag dont want to work so I thought I would ask here to check Im not being a complete nummpty. I used a 1.5V AAA  to test the first 2 with out a resistor but nothing, then tried another with 1.5V AA  nothing so I tried another with a 3V CR2023 but nothing and then tried a new one, added a resistor and tried all three  batteries again, but still nothing. 

 

Have I got a duff batch or an I doing something wrong? I know nothing of LED as I would normally buy a ready made lighting kit. 

 

Info I got with the lights:

 

Brand New: SUNSHINE MODEL.

         Product: Pre-soldered SMD Led 0603  RED.

         Size(SMD Led 0603): 1.6*0.8mm.

         Emitting color: RED.

         Wire length: the wire(copper) of the Anode is 20cm, the wire(copper) of the Cathode is 18cm.

         Wire diameter: 0.1mm.

         Operating Voltage1: 1.8V (without resistor), AC or DC Compatible.

         Operating Voltage2: 12V~18V(must connect a resistor in series),  AC or DC Compatible.

         Operating Current: 20mA.

 

Thanks for any help.

[LightningMk6]

The anode (the longer lead) should be positive, the cathode (shorter lead) negative but I'm sure you knew that, but just a possibility you may have them wrongly connected.

[rockpopandchips]

Yeh checked that out before i started to play. I did try one the other way away to check they have been wired as they should.

Edited March 17, 2017 by rockpopandchips

[rockpopandchips]

Could the what looks like bare copper wire be insulated, oh im going to look like a prat if it is...........

[rockpopandchips]

Problem solved im an idiot. The wires are of couse insulated.

Edited March 18, 2017 by rockpopandchips

[LightningMk6]

Glad you got it sorted in the end