Ushio 24V Eurostar MR16 Ushio Eurostar™ 24 volt series of Halogen MR-16 lamps provide professional grade lighting. The UV protected Halogen capsule is aligned within a Titanium Oxide coated reflector. The hard Titanium Oxide surface of the reflector provides consistent color throughout the life of the lamp. The 24 volts systems use half the current (amperage) than 12 volt systems. This allows higher wattage loads and up to twice as many as lamps on a longer lighting system. The 24 volt systems are less prone to voltage drop over longer wires and connections which results in more consistent brightness and color. Okay we have 24v bulbs, and I found an outdoor 24v transformer, if fixtures are rated for 50w, does it matter if it's powered by 24v or 12v? I could just use any mr 16 fixture? I can do the math and size and run my wires accordingly. Copper wire savings, plus wire concealment, makes 24v a noticeable competitve edge. When LED's are combined (with even lower watts), wire will even be smaller, runs even longer, with even more fixtures on runs. I mean, this is why they are putting these things in kitchens and crap, why are we not going this route with outdoor applications?