Surface mount high power LEDs among some other things - LED plant light

[Ilmarinen]

I'm building a plant light for home. I have built one previously using the Luxeon Rebel Color Stars - The ones that were already mounted on PCBs. It seems like the PCB versions are quite limited in availability, though. Of course it need not be necessarily Luxeon Rebel Colors as long as the chip is good and the wavelength is suitable.
What I would like to ask the people here is that how is working with the bare LED chips? They seem very small and a hassle to work with. Also with the cathode and anode mounted on the same side as the thermal path they would require some isolation/grinding in order to glue them to a piece of copper for heat dissipation.
I'm thinking about 150-200 ?mol/s*m^2 and looks like it would be 30-40 high power LEDs. What kind of powering option would people recommend for that? Previously working with 10 LEDs I just used a constant current driver - Should I just go for a 100+ Watt constant current driver for this too?

I attached the spectrum of the lamp I previously built - I am probably making a similar spectral composition but also adding some white LEDs to get at least some of the rest of the active spectrum.

[SeanB]

Buy the bare LED units and then buy some MCB power plates to mount them, along with some solder paste and extra flux. Then you can simply reflow them using a skillet ( or in the rest of the world a frying pan) as a heater.

[Zero999]

I thought you needed more blue than that but I suppose it depends on what you're growing.

It's much easier to buy the LEDs pre-soldered to the PCB and it's often not that much more expensive. The problem is an aluminium PCB js required to dissipate the heat properly so it's a pain to solder to.

[Ilmarinen]

I thought you needed more blue than that but I suppose it depends on what you're growing.

It's much easier to buy the LEDs pre-soldered to the PCB and it's often not that much more expensive. The problem is an aluminium PCB js required to dissipate the heat properly so it's a pain to solder to.

It was for growing lettuce and 10% blue light to 90% red light has been found to produce good growth(Goins et al. 1997). Blue light is also more important for photomorphogenic effects and the red spectrum for photosynthetic effects. This time around I'm making a more all-around lamp so I'll muck around with the spectrum a bit more.
It would be quite fun to use the chips directly but if it's going to be a huge pain in the ass then I'll just try to find some pre-soldered ones. What SeanB suggested doesn't seem too difficult, though.