Xenon or metal halide lamp with extreme lumen output and rock-solid color temperature—essential for exterior and long-throw work. Less heat than tungsten at equal power.
Xenon and metal halide discharge lamps are among the workhorses for large-scale exterior lighting and when distances are a factor. You ignite the gas in the burner, the arc voltage kicks in — and suddenly you have an extremely compact light source with brutal intensity. The lumen output is many times higher than incandescent systems: for the same electrical power, you produce significantly more light and, incidentally, less waste heat than with tungsten spots. This is noticeable in terms of transport, power consumption, and ambient cooling.
The color temperature remains stable throughout the entire burning time — no drift like with incandescent lamps that burn out. Xenon typically gives you around 6000K, pure xenon lamps even up to 5500K, and metal halide types vary between 4200K and 6500K depending on the mixture. This makes color matching in the edit significantly less annoying. On set, you notice: no color shift over four or five hours of continuous light — no post-production correction fiddling necessary. However, you need a stable mains power supply and a corresponding ballast/igniter, because these lamps don't just screw in like a light bulb. The burner itself is a high-pressure component — handle with care, never touch with your fingers (oil on the glass surface leads to hot spots and breakage). And: the ignition frequency should be limited, otherwise the lifespan is drastically reduced.
In practice, they are suitable for large events, stadium lighting, night exterior shots over 50+ meters, and also for projectors for background skylines. The color rendering (Ra 90+) is good enough for most situations — only for ultra-critical color shots might you need to filter or combine as fill light. Continuous burning operation? No problem, but maintenance is more important: regular lamp replacement according to manufacturer specifications (typically 1500–2500 operating hours), and the ballasts don't like interruptions. Another practical point: the reaction time from ignition to full illumination is 2–5 minutes — this is not switchable live like LEDs. However, you get unbeatable intensity per watt and a reliability that has been proven for decades.