How an Aging Halogen System Fails
Halogen fixtures fail predictably, and Spring homeowners describe the same sequence to us over and over. Lamps that once lasted a couple of seasons start going monthly. The far end of a run dims noticeably. Water finds its way into a fixture body and the socket corrodes. Someone replaces a burned-out lamp with whatever wattage the hardware store had, which loads the circuit further, which shortens the life of the lamps still working. Eventually the yard is half-lit and nobody can say which problem came first.
The underlying arithmetic explains most of it. A halogen MR16 draws roughly twenty to thirty-five watts, so twelve of them approach the capacity of a common residential transformer. LED fixtures producing comparable usable light typically pull single-digit wattage. That difference is why a converted system runs cooler, holds voltage better across a long run, and leaves capacity for the fixtures a homeowner adds later — and why lamps stop being an annual expense.
Heat is the other quiet culprit. Halogen lamps run hot enough to degrade gaskets, socket contacts, and lens seals from the inside over the years, which is how moisture eventually gets in even on a well-built fixture. Two decades of that cycle in Gulf Coast humidity is why so many original Spring systems are failing at the fixture rather than in the wire.
