My 1st of many Numpty questions

[Dal]

Dal, does that double switch have six terminals altogether? Which ones did you try to use for your two lights?

Yep 6 terminals altogether

 

[Dal]

Did you put the power cable to the shed yourself?

I did! Which I know is ok as all the power sockets and one light works ok.

 

[Dal]

15mm cable, hmm - that's very rare

Awwwww does that make it valuable? Should I rip it out and stick it on fleabay?

 

[Space cat]

So which two of those six terminals have you used for the light that works - and which of the remaining four did you use for the second light?

Regardless of the answer to that question, if you put the wires from the second light in exactly the same holes, wherever they may be, as you've got the ones from the working light --- does it work?