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.

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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

Details

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

⚡Dual brightness: 8mW/cm² & 40mW/cm²

📏3-inch foam spacing tube included

🔴670nm peak wavelength ±5nm

$130.58

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔴 Illuminate your wellness with precision red light power!

CUSTOMIZABLE INTENSITY - Two brightness settings let you tailor light output to your needs.
LAB VERIFIED PRECISION - Accurate 670nm wavelength ensures trusted, effective red light therapy.
POCKET SIZED POWERHOUSE - Ultra-compact and lightweight design for effortless daily use anywhere.
EYE SAFE BLUE LIGHT FREE - Deep red light excludes harmful blue spectrum, protecting your vision.
FOAM SPACER FOR OPTIMAL DISTANCE - Included foam tube guarantees perfect 3-inch spacing every time.

The Eagle670 670 nm Deep Red LED Flashlight delivers lab-verified, precise 670nm wavelength light with dual brightness settings (8mW/cm² and 40mW/cm² using the included 3-inch foam spacer). Its ultra-compact, lightweight aluminum design makes it pocket-friendly and easy to use for personal red light applications. The device emits pure deep red light without harmful blue spectrum, ensuring eye safety. Perfect for vision support, night vision preservation, and reducing blue light exposure, this flashlight is a versatile tool for health-conscious professionals seeking cutting-edge light therapy on the go.

Specifications

ASIN	B09W7STXQJ
Batteries are Included	No
Battery Description	3 AAA batteries
Battery Type	Alkaline
Best Sellers Rank	315,451 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,896 in Standard Torches
Brand Name	Eagle670
Bulb Base	GX53
Bulb Shape Size	S6
Color Temperature	1000 Kelvin
Colour	Blue,red
Customer Reviews	4.0 4.0 out of 5 stars (144)
Finish	Red
Fixture Features	Led Light,Lightweight,Portable
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	0.09 Pounds
Light Path Distance	3 Inches
Light Source Special Features	Eye Safety, Versatile Use
Manufacturer	Eagle670
Manufacturer Part Number	A670NMFLASH2
Material	Aluminium
Model Number	A670NMFLASH2
Mounting Type	Handheld
Number of Batteries	3 AAA batteries required.
Number of Items	1
Number of Lights	1
Number of Packs	1
Power and Plug Description	Battery Powered
Recommended Uses For Product	Preserving night vision, Reducing blue light exposure, General 670nm light application
Runtime	3 minutes
Set Name	Eagle670 3.0
Size	Pocket-Sized
Specification Met	true
Style	Compact
Type of Bulb	LED
UPC	195893150861
Unit Count	1.0 count
Water Resistance Level	Not Water Resistant
Wattage	8 Milliwatts

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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$130.58

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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