The 'Halo' Multi-Source Field Flashlight | Fenix LD35R 1800-Lumen Forward Spot + 360° COB Side Light Field Instrument

The Experience

Most flashlights illuminate what's in front of you. The Halo illuminates everything. A forward-facing 1800-lumen Luminus SST40-GEN2 spotlight reaches 1,106 feet for long-range terrain scanning and property navigation — and when the task shifts from distance to environment, a 360-degree COB side light ring activates to cast a soft, lantern-like area illumination across the immediate surroundings in white, red, blue, or combinations of all three. Two completely independent light systems in one instrument, toggled via a side switch that gives instant access to all fifteen modes without mode cycling confusion. A magnetic tail cap for hands-free surface mounting. A dual-fuel architecture that runs on the included 18650 rechargeable battery or two CR123A batteries when recharging isn't available. A stainless steel bezel with ceramic emergency glass-breaking tips for vehicle escape and emergency preparedness. And IP68 waterproofing that makes it submersible to the standard depth. This is the field instrument for the serious outdoor professional who needs both reach and environment — and refuses to carry two lights to get them.

Scientific Engineering

• Forward-Facing Luminus SST40-GEN2 Spotlight: The primary LED delivers a maximum 1800 lumens with a beam reaching 1,106 feet — sufficient for long-range terrain navigation, property boundary scanning, and nocturnal wildlife observation at serious distances — driven by the next-generation SST40-GEN2 for improved efficiency and thermal performance.
• 360-Degree COB Side Light Ring: A COB light strip embedded in the head of the instrument emits a soft, diffused, lantern-like illumination in all directions simultaneously — covering the immediate environment with even, shadow-free area light that the forward spotlight cannot provide. Four independent side light levels plus strobe provide complete area illumination control.
• Complete Output & Runtime Reference:
  
  
  • Spot Turbo: 1,800 lumens / 2.3 hrs / 1,106 ft.
  • Spot High: 800 lumens / 4.5 hrs / 738 ft.
  • Spot Med: 350 lumens / 10 hrs / 489 ft.
  • Spot Low: 100 lumens / 37 hrs / 262 ft.
  • Spot Eco: 20 lumens / 101 hrs / 118 ft.
  • Side White High: 150 lumens / 2.5 hrs
  • Side White Med: 80 lumens / 5 hrs
  • Side White Low: 30 lumens / 15 hrs
  • Side White Eco: 5 lumens / 101 hrs
  • Side Red: 15 lumens / independent switch
  • Side Red Flash: independent switch
  • Side Blue Flash: independent switch
  • Side Red & Blue Flash: independent switch
  • Strobe: independent switch
  • SOS: independent switch
    
    
• Red & Blue Side Light Modes — Independent Access: The COB side light ring produces dedicated red, flashing red, flashing blue, and combined red/blue flash modes — accessible independently via the toggle switch without cycling through white light outputs. Red mode preserves dark-adapted night vision during nocturnal wildlife observation. Blue and red/blue flash modes provide emergency position signaling visible at significant distance.
• Toggle Switch + Side Switch Dual Control: A side toggle switch provides direct mode selection between forward spotlight, side white flood, and color modes — while the main side switch controls on/off and output cycling within the selected mode. No unintended mode changes during active field operation.
• Dual-Fuel Battery Architecture: Primary operation on the included Fenix ARB-L18-3400 3400mAh 18650 rechargeable battery via USB-C charging. Emergency backup operation on two standard CR123A lithium batteries — a meaningful field reliability advantage when recharging isn't available at a remote property or field station.
• Stainless Steel Emergency Bezel: A stainless steel strike bezel inlaid with ceramic breaking tips provides an integrated emergency glass-breaking capability — a meaningful safety feature for the field professional operating in vehicles or structures where emergency egress may be required.
• Magnetic Tail Cap: A strong integrated magnet in the tail cap provides instant hands-free attachment to any ferrous metal surface — vehicle panels, equipment frames, gate hardware, and field station surfaces — for stationary area illumination at any angle without occupying a hand.
• Electronic Lockout: Double-press the power button to engage lockout — the instrument flashes twice to confirm locked status — preventing accidental activation during storage or pocket carry.
• Intelligent Thermal Management: Automatic step-down activates when internal temperature reaches 140°F — protecting the LED array during sustained high-output operation without operator intervention.
• USB-C Rapid Recharge: Full recharge from depleted in approximately 3 hours via the integrated USB-C port. Battery status indicator displays remaining capacity.
• A6061-T6 Aluminum Construction: CNC machined aircraft-grade aluminum with HAIII hard-anodized finish — the same material specification and surface treatment found throughout the Fenix premium lineup.
• IP68 Waterproof & Dustproof: Submersible to the IP68 standard — fully protected against rain, submersion, and active outdoor use in demanding field conditions.

Boutique & Conservation Values

• Two Illumination Systems, One Instrument: The forward spotlight handles distance — terrain navigation, property boundary scanning, wildlife observation at range. The 360-degree COB side ring handles environment — campsite illumination, worksite area lighting, close-range field station coverage. Together they eliminate the need to carry separate instruments for separate illumination tasks.
• Nocturnal Observation Ready: Independent red side light access, 101-hour maximum Eco runtime, and magnetic hands-free mounting make The Halo a capable companion for extended nocturnal wildlife observation — where area illumination, distance capability, and night vision preservation are simultaneously required.
• Emergency Preparedness: The combination of SOS mode, red/blue emergency flash, dual-fuel architecture, and ceramic glass-breaking bezel makes The Halo one of the most emergency-capable field instruments in the collection — a meaningful capability for the serious estate steward operating across remote property environments.
• Fenix Limited Lifetime Warranty: Every Halo is backed by Fenix's Limited Lifetime Warranty — 15-day replacement for manufacturing defects, 5-year free repair for normal use issues, and lifetime limited warranty coverage beyond that.

Specifications

• Maximum Output: 1,800 lumens (Spotlight Turbo)
• Maximum Beam Distance: 1,106 ft. (337 m)
• Light Sources: Luminus SST40-GEN2 forward spotlight (6500K) + COB side light ring (8000K)
• LED Lifespan: 50,000 hours
• Lighting Modes: 15 total — 5 forward spot + 4 side white + red + red flash + blue flash + red/blue flash + strobe + SOS
• Maximum Runtime: 101 hours (Spot Eco, 20 lumens)
• Primary Battery: Fenix ARB-L18-3400 18650 3400mAh (included, USB-C rechargeable)
• Backup Battery: 2x CR123A lithium (not included)
• Charging: USB-C, ~3 hours to full charge
• Waterproof Rating: IP68
• Construction: A6061-T6 Aluminum, HAIII hard-anodized finish
• Length: 5.37"
• Head Diameter: 1.34"
• Body Diameter: 1.00"
• Weight: 6.53 oz. (including battery)
• Includes: ARB-L18-3400 battery, USB-C charging cable, nylon holster, lanyard, spare O-ring
• Warranty: Fenix Limited Lifetime Warranty
• Shipping Weight: ≈1.5 lbs.