thanks
After my initial disappointment that it did not work, I read L as the positive supply and N as the negative. No output. I hoped it was polarity protected and wired it the other way, which made more sense as the wires are red and blue. 840 mA out put over a range of input voltage. Pleased in the end.
They are well sealed and the 30 W put one the I got is very close to 30 watts. At first I thought it did not go as the L and N which I took to be positive and negative is incorrect. The Positive is in fact the red wire but is marked as N other than that seems good I have not run it for long only about 5 minutes at this stage