How do you use it for eyesight improvement. how close to my eye do i hold it? do i look right into it?

If you go online, you will find articles that address this question and tell/show you what to do. I look right into it, and others I've discussed this with online do also. Between 8-9AM, and for me I do it 3X a week, I do each eye for 3 minutes. I have only used it a short time, so I can't give a report yet, but It does feel good to do it.

Can the brightness level be adjusted? I'm concerned that this light may be too bright to look at.

The brightness cannot be adjusted, but the farther away you hold it, the lower the energy at the target will be. You can also add a diffuser to reduce the energy. You can purchase a diffuser, or look into scotch tape or teflon tape as an option. Search "diffuser vs scotch tape" online.

How do i use this " torch-like tube" to "emit energy equivalent to 40 mW/cm2 or 4.8J/ cm2 for 2 min" ???

1.21 Jigga watts in a tri-phase capacitor, with a velocity at 88 mph. See you in the future! The answer is 42!

This gets really hot. It has only been on a few minutes. I can hardly hold it. Is this normal?

The previous version of the flashlight occasionally had this issue. Our new updated model does not get hot. Please message us and we will send you the new version.

670 nm Deep Red LED Light | USA Lab Verified 670nm Flashlight (670 nm LED) w/Spacing Tube | Red Light 670 nanometers | Lightweight and Pocket-Sized by Eagle670

Product ID: 474730582

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Details

Colour
Blue red
Light source type
LED
Material
Aluminium
Power source
Battery
Special feature
Led Light

⚡Up to 40mW/cm² output power

🔴670nm peak wavelength ±5nm

🧴Includes foam spacing tube

Description

🔴 Illuminate your wellness with precision-engineered deep red light!

EYE SAFE RED LIGHT - Zero blue spectrum ensures gentle, non-disruptive illumination for your eyes.
DUAL BRIGHTNESS MODES - Switch between 8mW/cm² and a powerful 40mW/cm² for tailored intensity.
ULTRA PORTABLE DESIGN - Lightweight (41g) and pocket-sized for effortless daily carry and use.
LAB VERIFIED PRECISION - Accredited USA lab tested for true 670nm wavelength—trust your light source.
SMART SPACING INCLUDED - Foam tube spacer guarantees perfect 3-inch distance for optimal performance.

The Eagle670 670 nm Deep Red LED Flashlight delivers lab-verified, high-quality 670nm wavelength light with dual brightness settings up to 40mW/cm². Compact and lightweight at just 41 grams, it includes a foam spacing tube for consistent 3-inch distance use. Designed for personal red light therapy, night vision preservation, and blue light reduction, this portable device offers eye-safe illumination without harmful blue spectrum exposure.

Specifications

ASIN	B09W7STXQJ
Batteries are Included	No
Battery Description	3 AAA batteries
Battery Type	Alkaline
Best Sellers Rank	80,405 in DIY & Tools ( See Top 100 in DIY & Tools ) 559 in Standard Torches
Brand Name	Eagle670
Bulb Base	GX53
Bulb Shape Size	S6
Color Rendering Index	19.00
Color Temperature	1000 Kelvin
Colour	Blue,red
Customer Reviews	4.0 out of 5 stars 135 Reviews
Finish	Red
Fixture Features	Led Light,Lightweight,Portable
Included Components	Foam Tube Spacer
Included components	Foam Tube Spacer
Item Dimensions D x W x H	85D x 25W x 25H millimetres
Item Shape	Cylindrical
Item Type Name	LED Flashlight
Item Weight	41 g
Light Path Distance	3 Inches
Light Source Special Features	Eye Safety, Versatile Use
Light source type	LED
Manufacturer	Eagle670
Material	Aluminium
Model Number	A670NMFLASH2
Mounting Type	Handheld
Number of Batteries	3 AAA batteries required.
Number of Lights	1
Power and Plug Description	Battery Powered
Power source	Battery Powered
Recommended Uses For Product	Personal red light therapy, preserving night vision, reducing blue light exposure
Special feature	Led Light , Lightweight, Portable
Specification Met	true
Style	Compact
Type of Bulb	LED
UPC	195893150861
Unit Count	1.0 count
Voltage	4.5 Volts (DC)
Water Resistance Level	Not Water Resistant

Reviews

F**H

Excellent

Excellent have been using this every day for 4 months and have noticed my close vision had improved a lot

6.11.2025

A**R

Not sure it helps

Torch worked fine

30.12.2025

D**.

Dont waste your money

Bought this torch specifically because of its Red 670 nanometer output. Worked ok for few times but now shines standard yellow out put on either setting 1or2. Very dissappointing complete waste of money. Would give no star rating but have give it 1star to allow the review to proceed

5.08.2025

M**N

Legit

It’s definitely 670nm Red Light. Little pricey but the peace of mind and legitimacy is the reason it’s over odds. Happy with purchase and if someone’s looking for red light I’d recommend.

11.01.2024

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2 weeks ago

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