1000W Fresnel spotlight with lens optical focus control for film production, flexibly usable as key light or accent lighting with variable beam angle.
Technical Specifications
The 1K Fresnel produces 10,000-12,000 Lux at 3 meters in spot position (focused). The Fresnel lens consists of concentric rings with a diameter of 200mm, which focus parallel rays and allow for strong light concentration. The color temperature depends on the light source: tungsten incandescent lamps achieve 3200K, HMI lamps provide 5600K daylight equivalent.
The manual focusing mechanism allows continuous adjustment from wide flood mode (100°) to narrow spot mode (26°) via a sliding arm – the light intensity remains relatively consistent across the entire range. Typical dimensions: 370mm width x 280mm depth with a weight of 5.5 kg (without stand). The 1K consumes, depending on the power source:
- Tungsten bulb: direct 1000W power consumption
- HMI bulb (1000W HMI): approx. 1200W with ballast
Heat generation is significant – approx. 750 watts of radiant heat in spot mode, which is why safe distances to actors and flammable materials must be maintained.
History & Development
The Fresnel lens was developed in 1822 by Augustin-Jean Fresnel for lighthouses and first adapted for cinema lighting in 1950. The 1K variant became the standard for studio and location film productions in the 1960s, offering an ideal balance between portability and light output.
Originally equipped with tungsten incandescent bulbs, the introduction of HMI bulbs in the 1980s enabled more energy-efficient alternatives. Early models from ARRI, Mole-Richardson, and Strand Lighting dominated market segmentation until 2010. Modern 1K Fresnels feature improved thermal protection (over-temperature protection), ceramic lamp sockets, and optimized reflector geometry.
Practical Use in Film
The 1K Fresnel was the standard workhorse light for European television and low-budget film production since the 1970s. In Werner Herzog's "Aguirre, the Wrath of God" (1972), the lighting for the Amazon scenes was achieved with portable 1K Fresnels – not with generators, but powered by generators on riverboats.
In modern productions, the 1K is often used as fill light or key light for close-ups. David Fincher's "The Social Network" (2010) used 1K Fresnels for the interview sequences to emphasize the forensic sharpness and psychological intensity of the deposition scenes. The continuous focus range allows for flexible response to changing actor positions.
Documentary filmmakers appreciate the 1K's portability – a complete lighting kit for a two-person crew fits into two cases.
Variants & Alternatives
The 2K Fresnel (2000W) offers double the light output (20,000-24,000 Lux at 3m), but requires a stronger power supply and more intensive cooling. The 1K HMI provides 5600K light directly (not just with a filter), but offers limited heat savings.
LED alternatives such as the ARRI SkyPanel L30-1 offer similar area illumination with significantly less heat and power consumption (300W), but cannot match the focusability of a true 1K Fresnel. Kino Flo and other fluorescent panels produce cooler lights (4300K) with extremely low heat generation, but require more space for equivalent light output.
The advantage of the classic 1K Fresnel remains its speed in focus adjustment and its penetrating light output for exterior shots under cloudy skies or in large interiors.