Getting the Most Out of Gallium Iodide UV Lamps
Standard mercury vapor lamps are great, but they have a blind spot. Gallium iodide (GaI) lamps are how we fix that. We build these tubes to push the light further into the UV-A and visible range. Why does that matter? Because if you’re working with thick coatings or resins that need a deep cure, shortwave UV just bounces off the surface. GaI actually gets inside. The science part (made simple) Adding gallium to the iodide fill changes how the lamp behaves. You get this focused spike of energy right around 400nm to 450nm. But here’s the catch: it’s a balancing act. You can crank up the wattage to get more punch, but you’ll fry your electrodes if you overdo it. If your ballast isn’t perfectly matched to the tube’s impedance, you’re basically just paying to burn out your lamps faster. Built for your specific setup We don’t believe in “off-the-shelf” when it comes to this stuff. You tell us the length and diameter that fits your machine, and we make it happen. We use high-purity quartz glass for a reason. We want that UV hitting your workpiece, not getting trapped inside the tube wall. Even the end-caps matter. We wire them for a tight, secure fit because a loose connection means arcing—and arcing means your lamp is dead on arrival. The reality of the heat These lamps pack a serious punch, but they run hot. Really hot. You can’t just slide one into a housing and hope for the best. You need a cooling system that actually works, whether that’s forced air or water jackets. If the tube overheats, the gallium starts to shift. Then your light output drifts, your cure times go wonky, and suddenly your quality control is a nightmare. Keep it cool, and everything stays consistent.