High Quality Half white 380mm 400v 2500w halogen heating lamp with SK15 ceramic

July 22, 2026

Let’s talk about the 380mm Half-White Halogen Lamp

We built this thing for when you’re dealing with some seriously heavy thermal loads. It pulls 400V to cram 2500W of power into a pretty short tube. Why do it this way? Because it gives you the heat flux you need to keep your cycle times fast, but it doesn’t draw so much current that your wiring starts to melt. It’s just a smarter way to get the heat where it needs to go. The secret is in the “half-white” coating. We put a selective quartz coating on part of the tube to control how the infrared heat comes off. Basically, you can point the heat exactly at the workpiece and stop it from bleeding into the machine frame. No more wasting energy heating up your equipment instead of your product. Now, about the build. We went with SK15 ceramic ends. If you’ve used standard metal caps at 2500W, you know they tend to warp or oxidize. Not great. Ceramic doesn’t do that; it just stays stable. Plus, the SK15 interface gives you a tight fit. That means you don’t have to worry about arcing at the contact points. If you’re swapping these into an old rig, they should slide right in as a replacement for most industrial short-wave heaters. A few things to keep in mind for the install. This setup packs a massive punch. Since it’s a 400V unit, your power supply has to be rock solid. If you get voltage spikes, you’ll fry the filament. Fast. Also, remember that the half-white coating changes how the heat emits. When you first wire it up, spend a little time calibrating your PID controllers so you don’t overshoot your target temp. And one last tip: check your cooling fans. Make sure they can handle the ambient heat coming off those non-emitting sections of the tube.