There are plenty of options out there these days, including simple PAR38 LED bulbs that will fit into a normal lighting socket.
Don't have a controller. Keeping it fairly simple, I chose to use 10 watt multichip LEDs with standard 12 Volt DC power supplies & dimmers for my build. Most of the components are from online auction site. Free shipping, takes a while but no brokerage or customs fees so far. Aluminum stock sourced locally. Been running fine for almost 2 years. I'm in the process of modifying it slightly, with different heat sinks & building a proper cover. Link to build is below.
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