That’s quite a bit of total wattage.
1.6 Amperes per fixture by being a bit conservative on the wattage (350W) with a 220VAC line voltage assuming 100% efficiency.
For the total, multiply by 12 units and you’d have around 19.2 Amperes.
You’d want to be as conservative as is reasonable for the copper wiring. Personally, I’d run at least a couple of circuits. Perhaps two, 19.2/2 = 9.6A per circuit. With that, you’d be less than the 15A per circuit. Copper would be 14/3 for less than a 50 foot run … but even better (and safer for high consistent loads) is to go 12/3 and this will be safe with margin for the 100 foot run on two circuits … but I’m paranoid.
Be careful 220/240 is nasty for shock. Keep the circuits reserved for the lighting and try not to overload. And, yes, study on how to safely wire stuff up. Electrical fire due to loose connections, under-sized wire, grounding issues, etc can make for a bad day. But, with a bit of sleuthing, most anyone can safely DIY install circuits.
Understanding that you are just researching, as Larry notes, an electrician can make short work of this and build to code. Around here, electricians are inexpensive (no state requirements against DIY). Plumbers are outrageous. We’ve had electricians do a ton of work for us in the past. Time wise it was worth it.
I know nothing about the Titan, check to make certain it is rated for the draw.