What's the maintenance costs like on these types of lighting choices? Very expensive upfront, but if a couple of the leds go out, can you replace them individually? And whats the price of a replacement plasma bulb like?
I've heard a Gavita rep mention in one of the videos you can send back the heatsink/bulb part for replacement for 150 euros, so about 200 USD. The bulb is rated at 30,000 hours, but I'd prolly replace it around 10,000, so a little over 2 years. 2 year warranty from Gavita as well, so if it fails before then they will replace it for free.
As for the LEDs, the Kessil unit is something of a proprietary design, using an array of high output LEDs in a small area, a spotlight kinda deal that doesn't lend itself to self-service. 1 year warranty from Kessil at least.