On the blow molding floor, preform heating is where the cycle either makes it or breaks it. On a Krones Contiform 3 Speed, uneven heat across the preform wall shows up as haze, weak stretch, and blown bottles at the cavities that run hotter. You chase the heating curve, tweak power, and still get drift. What Matters Technically The Contiform 3 Speed heater lamp is a short-wave infrared halogen emitter matched to the machine’s heating tunnel geometry. Each lamp runs on the OEM voltage and power profile, so the power matching is 1:1. Its quartz envelope delivers fast response, and the filament layout is tuned to create a predictable thermal field. That gives you a repeatable temperature rise across the preform, from shoulder to finish, with tight control over the heat profile. The R7s connector and dimensions are spec’d to fit the reflector and mounting without mods. Why It Works Here With this lamp, you get stable preform heating that keeps the stretch ratio consistent, so you cut scrap and reduce unplanned stops. The lamp’s quick-on characteristic shortens the time to reach set temperature after a restart, which helps you get back to full speed faster. In practice, that means more bottles per hour, less energy spent on reheating, and fewer lamp changes. We have seen Contiform 3 Speed lines hold output with less than 5% output drop past 5,000 hours in steady PET schedules. Things to Know Installation is straightforward, but reflector cleanliness matters. Dust and film buildup change the thermal distribution and can create hot spots. Also, lamp output is sensitive to voltage stability; a small drop changes the heating curve. Pair the lamp with the OEM-spec voltage and keep the tunnel airflow as designed, and the lamp performs as intended.