I fitted a Boomslang together with Wipac crystal lenses - a big improvement. I'd say the light output is as good as many modern cars, but not stupidly dazzling as many are. It's certainly not without flaws - the headlamp bowls had to be cut to allow the headlamp plugs through. I tried removing the wiring from the plugs so that the wiring would pass through the existing hole in the bowls, but the ceramic plugs are fragile and had to be reinforced afterwards. I fitted the relay unit well out of the way inside the wing (just behind/below the power steering reservoir) and used convoluted conduit to protect the relays and wiring, and also gave it all a thorough spray with water displacement. I guess it's been fitted for about 4 years without any issues.