I can confirm the quality of the devices they send. And from the shipping it seems to be Shenzen. Their 1900K VTC (triple-phosphor) LEDs seem to be out of stock though. They have 80+CRI on candlelight. DIY Perks (youtube) got some and made a video destribing the difference between their double phosphor and 'normal' chinese LEDs. One can see the quality of the actual LEDs (not the packaging/phosphor(s)) by running them at threshold voltage, and seeing if all dies in the package light up simultaneously. If they don't, the device is of 'chinesium' quality. Ask for a refund, as it's going to burn out soon (uneven current distribution between the parallel columns).

And as far as "really expensive" goes: the price of the LED is 10% of the electricity cost over a life of 50k hours, which is about what you get out of them without fancy cooling. See http://www.wolframalpha.com/input/?i=Plot%5B(1000.+%2B+0.2+x... , for TCO over time. Units are EUR and hours, and I calculated a price of 20ct/kWh. You can take these prices as net prices for USD, tax and forex cancel out. Yes, these are not economical if you don't use them. In that case, use cheap filament bulbs or similar. Don't cheap out on the quality of light you use. Get double phosphor (other manufacturers offer those too) for normal use, and consider triple phosphor for uses where color rendition is particularly important (photo shooting/inspecting things/etc). For the mentioned price you can get a cheap driver and the LED, but please don't burn your LED with inadequate cooling or a bad driver. They are not cheap ;)