Robert Juliat Arthur LT - 800W 7000K LED Followspot with 4 to 10-Degree Zoom and DMX in Black Finish

The Robert Juliat Arthur LT is a sophisticated 800W LED followspot designed for long-throw applications, delivering exceptional performance while maintaining a compact form factor. This innovative followspot features a narrow zoom range of 4 to 10 degrees, making it capable of achieving outstanding output that surpasses that of a traditional HMI 2500W Aramis followspot. With a luminous output of 39,000 lumens and a color temperature of 7000K, the Arthur LT excels in showcasing performers with high-quality light, achieving a minimum output of 2000 lux at a distance of 50 meters (200 fc at 165 ft). The high color rendering index (CRI) of over 94 ensures that colors are depicted vividly and accurately, making this followspot an essential tool for any lighting designer.

Engineered for versatility and ease of use, the Arthur LT features a fully closing iris cassette that can be removed quickly for fast replacement. This ensures minimal downtime during productions. The universal gobo holder is compatible with 'B' size glass and metal gobos, allowing for a wide range of creative lighting effects. The ergonomic dimmer control enables one-handed adjustments for dimming, panning, and tilting, making it straightforward for operators to manage lighting levels during performances. Additionally, local light intensity adjustments can be made using a built-in potentiometer for quick fine-tuning.

The Arthur LT includes an internal glass filter holder for durable colored, dichroic, or textured glass, as well as an individually removable color frame that simplifies gel replacement while keeping the color cassette intact. The six-way self-cancelling boomerang color changer allows for multiple filter usage simultaneously, adding further flexibility for lighting designers. A USB connector is provided for connecting additional accessories, enhancing the followspot's functionality. With adjustable response times for dimming - allowing for either fast or slow transitions - the Arthur LT can effectively simulate tungsten lighting behavior, all configurable via DMX protocol.

In terms of optical performance, the Arthur LT is designed with variable zoom optics that deliver sharp focus across all beam angles. The electronic dimmer operates smoothly without clipping or cut-out at low intensity levels, ensuring consistent quality throughout its dimming range. The followspot maintains its color temperature even when dimmed, providing reliable and professional lighting output. The Arthur LT is constructed with a strong sheet metal and aluminum body, ensuring durability in demanding environments while maintaining a lightweight design for easy handling.

Made in France, the Arthur LT boasts silent-running variable fans that facilitate effective cooling, making it suitable for both opera houses and concert venues. The ergonomic wrap-around handle enhances comfort during operation, while captive knobs and handles provide added security when working at height or during transport. Maintenance is simplified with easy access to all components, allowing for quick cleaning and re-lamping. The modular design includes independent PSU, drivers, and CPU, which can be serviced easily thanks to the plug-and-play system, ensuring the Arthur LT is always ready for action.

Features

• Power: 800W LED source with a luminous output of 39,000 lumens, exceeding the output of traditional HMI 2500W followspots.
• Color Temperature: 7000K, providing bright and clear lighting that enhances performer visibility.
• Zoom Range: 4 to 10 degrees, allowing for precise beam control and versatility in long-throw applications.
• Optical System: Features excellent gobo projection with a smooth flat beam and no hot spots.
• Control Features: Local dimming control via built-in potentiometer, with DMX compatibility for remote operation and integration.
• Dimensions: Length: 65.6 inches, Width: 18.1 inches, Height: 20 inches, designed for efficient use in larger venues.
• Cooling: Silent-running variable fans for effective thermal management, suitable for quiet environments.
• Construction: Durable steel and aluminum housing built for long-term reliability and performance.
• Power Supply: Integrated electronic PSU with automatic voltage detection for global compatibility.
• Weight: 248.6 lbs, ensuring stability during operation while still manageable for transport.

Specifications

Source

• Lamp Type: LED
• Power: 840W
• Lumen Output: 39,000 lumens
• Color Temperature: 7000K
• Lamp Life: 20,000 hours
• CRI: 95

Optics

• Type: Zoom
• Range: 4° to 10° (Field angle)
• Focal length: - mm
• Gel Filter Shape: Circle
• Gel Filter Standard Size: 270 mm (10.6 in)
• Gobo Size: B
• Gobo Material: Metal, Glass

Photometrics

• Optics (4-Degree): 5,500 lux (30m), 3,100 lux (40m), 2,000 lux (50m), 1,400 lux (60m), 1,050 lux (70m), 770 lux (80m)
• Optics (10-Degree): 1,350 lux (30m), 750 lux (40m), 480 lux (50m), 330 lux (60m), 250 lux (70m), 190 lux (80m)

Remote Control

• Data protocol: USITT DMX512-A, RDM, Art-Net, sACN
• Data IN connector: 5 pins XLR male + 2x etherCON RJ45
• Data OUT connector: 5 pins XLR female

Dimensions and Weight

• Length: 65.6 inches
• Width: 18.1 inches
• Height: 20 inches
• Weight: 248.6 lbs

Construction

• Housing: Steel sheet - Aluminum
• Colour: Black
• Cooling: Variable fans
• Maximum ambient temperature (Ta): 40°C (104°F)
• Maximum case temperature (Tc): 51°C (123.8°F)
• Total heat dissipation: 3 516 BTU/h
• Ingress Protection (IP) rating: IP20

Electrical compatibility

• 220/230 V - 50 Hz
• 245 V - 50 Hz
• 110/120 V - 60 Hz
• 208 V - 60 Hz
• 220/230 V - 60 Hz
• 100 V - 50 Hz
• 100 V - 60 Hz
• Selector: automatic detection

Power Input

• Type: removable power cord with compatible powerCON TRUE1 connector (included)
• Cable: 14 AWG SJ type (UL/CSA)
• Length: 1.5 m (4.9 ft)
• Power connector: without connector

Power Supply Unit

• PSU: Internal - Electronic PSU - Flicker free with PFC
• Control: Local / DMX
• Protection: Mains: 20A 2P 2D fast switch breaker - UL /
• Power thru: compatible powerCON TRUE1 - Maximum of 3 units (230 V) / 1 units (120 V)