Practicality of driving LEDs with high voltage?
So you want to make a 24V->360V controlled current SMPS that can supply more than 1kW? I don't think that's a very easy project to start with. At 24V you're going to be dealing with almost 50A of current. If it was an off-line switcher the currents would be lower, but a 1kW supply is still going to be a challenge. 

You don't mention the topology you have in mind for the step-up, but I doubt a simple boost converter will be practical- you'll probably need a transformer-based forward converter or other high power topology. In which case you might as well do an off-line switcher. 

If you really want to run the LEDs at 360V, there will be a serious lethal shock hazard- probably more than 400VDC at substantial current if the circuit is broken.

It might be practical to fool an off-the-shelf 100W 36V (nominal) supply into supplying constant current by diddling the trim input with an op-amp, but you'd need 10 of them. On the plus side, a single supply or LED failure won't take out the whole lot.

Or a fixed (say) 48V supply and 10 individual buck converters (which would only require inductors). 

However this is done, to get constant current to 10 different LEDs with a total of more than 1kW power is not going to be really cheap or simple if its done properly.