Short answer: NO

To function in series, their current draw must be EXACTLY the same. This is impossible, not just because their loads might be different, but also because as a switching power supply its input current decreases as input voltage increases. (Their V/I curve looks like a negative resistance within their operating range.)

Second problem: Isolation between input and output isn't specified. This could place higher standoff potentials on the pucks that are nearer to the mains hot side. I'm guessing that if you wanted your LEDs to float at 240V you would hook them directly to the mains.

This is my opinion only; check with the factory. They might have a product that meets your needs.

How many LEDs are you trying to drive?

There are plenty of off-the-shelf drivers that will run right off the mains. And they are alot cheaper than those buck-pucks.

Originally Posted by hazey36

just to clarify though, you weren't referencing the current vs voltage sheet in the link i posted were you?

Nope. Buck converters just work like that.

For a constant power out, they take a relatively constant power in. So if their input voltage increases, they actually use less current. Just the opposite of a normal resistor (hence the term 'negative resistance') They would go crazy in series with one another.