I thought 940nm LEDs did not emit glow?

940nm "will not emit any glow" , if the flashlight is glowing red its closer to a 850nm LED..

What is body diameter?

The IR flashlight has a body diameter of about 1.1 inches.

can you light press for momentary on with the tail switch?

yes, This flashlight is used to light the flashlight through the tail switch.

So, this flashlight will not show up on gen 2 or lower night vision goggles because of the 940nm wavelength?

For Gen 1, it won't work, range is super limited, Gen 2 or 3, it will work, but the range and brightness will be less than 850nm.

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940nm IR Flashlight Illuminator Infrared Light Night Vision Adjustable Focus LED Flashlight Torch for Hunting (Not Included 18650 Battery)

Product ID: 253301435

Details

Colour
Black
Light source type
LED
Material
Aluminum
Power source
Battery
Special features
Adjustable

🎯Adjustable zoom focus

🔦940nm invisible IR beam

🛡️Aircraft-grade aluminum body

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R$399

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌌 Illuminate the unseen, own the night.

RUGGED READY - Crafted from aircraft aluminum alloy with IPX4 waterproof rating and anti-slip design for durability in any outdoor adventure.
TRUSTED SUPPORT - Backed by responsive customer service ensuring your night vision missions never miss a beat.
LIGHTWEIGHT POWERHOUSE - Weighing just 110g, this torch packs high output with a single LED and runs on a rechargeable 18650 battery (not included).
PRECISION ZOOM CONTROL - Easily adjust the beam from a tight spotlight to a wide floodlight, optimizing visibility from 20 to 50 meters.
STEALTH MODE ACTIVATED - Emits powerful 940nm infrared light invisible to the naked eye—perfect for covert night ops with your night vision gear.

The FandyFire 501IR is a compact, handheld infrared flashlight emitting invisible 940nm IR light optimized for night vision use. Featuring adjustable zoom via an optical convex lens, it delivers focused or floodlight illumination up to 50 meters. Built with durable aircraft-grade aluminum and IPX4 waterproofing, it’s designed for rugged outdoor activities like hunting and exploration. Powered by a rechargeable 3.7V 18650 battery (not included), this lightweight torch ensures stealthy, high-performance night vision support.

Specifications

ASIN	B07J58P2WR
Additional Features	Adjustable
Batteries are Included	No
Battery Description	3.7v rechargeable 18650 battery
Battery Type	Lithium Ion
Best Sellers Rank	#9,658 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #153 in Handheld Flashlights
Brand Name	FandyFire
Bulb Shape Size	B9
Color	Black
Customer Reviews	4.0 4.0 out of 5 stars (278)
Finish Types	Knurled
Included Components	Battery
Item Dimensions D x W x H	123D x 24W x 28H millimeters
Item Weight	4 Ounces
Light Output Maximum	940 Lumens
Light Path Distance	50 Meters
Light Source Type	LED
Manufacturer	FandyFire
Manufacturer Part Number	4350254474
Material Type	Aluminum
Mounting Type	Handheld
Number of Light Sources	1
Power Source	Battery Powered
Recommended Uses For Product	Outdoor Activities, Emergencies, Household Tasks
Shape	Rectangular
Specification Met	IPX4
Style Name	501IR LED flashlight
UPC	788000141090
Unit Count	1.0 Count
Water Resistance Level	Waterproof
White Brightness	940 Lumens

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