We build carbon fiber halogen heating tubes for machines that need heat—fast—and in a seriously tight space. These tubes throw out intense infrared energy, perfect for jobs where you need to hit the temperature quickly and hold it steady. Here’s the thing: these tubes are built to run at 400V, pulling 2500W to pack a lot of heat into a 300mm active length. That 400V rating eases the load on your power supply, so you can use smaller wiring and keep stress off the socket. And the 2500W gives you the punch you need to heat small zones fast. But with that kind of power density, you’ve got to plan for cooling—keep the surrounding electronics and optics from getting cooked. Inside, a carbon fiber filament sits inside a high-purity quartz envelope. We chose quartz because it handles sudden temperature swings and stays steady when transmitting shortwave infrared. The halogen cycle does its job too, keeping the filament from evaporating too fast. That means the tube holds its output longer and survives repeated on-off cycles without burning out. The R7s connector is simple, two-pin, and does the job without extra hardware. It lines up clean and carries the load. And because it’s a drop-in fit for many existing fixtures, swapping tubes is quick—no rewiring the whole setup. Use these tubes wherever you need rapid, localized heating: plastic sealing, adhesive curing, or tight little material testing cells. The shortwave response heats the target directly, not the air around it. That keeps cycle times short and control loops steady. When the fixture is rated for 400V and the cooling is set up right, you get consistent output over thousands of cycles. It’s just dependable, day after day.