David Chandler Night Reader Pro LED Red Light Keychain for Astronomy

Our Price: $12.00
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Our Product ID: PAOA-DC-NRP
Manufacturer SKU: NRP
Item Can Ship: Worldwide
David Chandler Night Reader Pro LED Red Light Keychain for Astronomy

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  • David Chandler Night Reader Pro LED Red Light Keychain for Astronomy

Quick Overview

  • The little light with big performance.
  • Full-featured dimmable red LED light can be used at high intensity for walking about and set to a lower intensity for comfortable use with an atlas or planisphere.
  • Night Reader Pro comes with easy quick-clip keychain attachment to keep it close at hand.
  • Made in U.S.A. Lifetime Warranty

Product Details

The Night Reader Pro is a true Astronomer's Flashlight built with a 630nm red LED to help you read a planisphere or atlas in the dark without depleting your night vision. There is no white light option to accidentally activate so you can use the Night Reader Pro without worry of loosing your night vision or upsetting your neighbors at a star party. Although the light is bright enough to be used when setting up equipment, the brightness can be brought up gradually to any level desired for reading at close quarters with minimal after imaging. The LED is shielded so the light will shine where you want it, but not directly in your eyes.

Night Reader Pro is made tough in the USA and carries a lifetime warranty. The standard CR2032 battery is easy to replace and will give you 36 hours or more of operation. The housing is rated IPX-4 for moisture resistance and has gold-plated contacts for reliable service. A quick-clip keychain attachment is provided to keep the light handy with fast and easy access. This light will be there when you need it and you won't be fumbling with a split-ring attachment. With the Night Reader Pro clipped to a zipper on your jacket or to the strap on your binoculars you will always have a top-notch light source at the ready.

It can take up to 45 minutes for the human eye to completely adapt to darkness as a protein called Rhodopsin builds up in the rod cells. Once your night vision is adapted you might be surprised at how many more objects are visible, and how much better you can see details in faint objects. Unfortunately all it takes is a about a second of the bright white light from a flashlight or a cell phone display to deplete your night vision and have you waiting around to adapt again! The longer wavelength red light produced by our Night Reader is detected by the cone cells in your eye and does not deplete Rhodopsin in your rod cells. This allows you to read a chart or atlas and immediately return to viewing the sky.


Requires one CR2032 battery (included).

Manufacturer part number: NRP

Additional Information

The Night Reader Pro uses advanced programming to provide several features with easy to use one button control. The Night Reader Pro gives you the following useful modes of operation:

Instant Full Power On/Off:
Simply press and release the button for instant on at full power.
One press and release will turn the light off again. 

To gradually ramp up from Off:
Simply press and hold until desired brightness is reached.
The light will blink once when you have reached the highest setting.

To gradually ramp down from Full Brightness:
Simply press and hold until desired brightness is reached.
The light will blink once when you have reached the lowest setting.

Note: You can continue to ramp up or down from any brightness setting not just from On or Off.
– To exit this mode, simply turn the light off.

Three-Minute Timer Mode:
The three Minute Timer mode automatically shuts the light Off after three minutes. While in this mode you have full access to the full range brightness control, the three strobe beacons and automatic SOS all of which will shut off after three minutes. This mode is great because it allows you to use the lights full functionality and is a guarantee against inadvertent battery drain.
To access this mode press the button rapidly four times or until the light only stays on when pressed. Next press and hold the button, the light will turn itself Off, continue to hold the button for another five seconds, the light will blink once to let you know you are now in Three Minute Timer mode.

To exit this mode press the button rapidly four times or until the light stays on only when pressed. Next hold the button for four seconds or until the light shuts off. And you have exited the Three Minute Timer mode!

Strobe Beacons:
Beacon mode gives you Slow Medium or Fast Strobe and an automatic SOS signal mode. Great for use as emergency warning lights, trail markers, or to attract attention in any situation.
To Access from either Off or On
Simply press and hold. The light will ramp up or down in brightness then blink once. Continue holding the button down after the single blink. You have reached Slow strobe, continue holding to reach Medium and Fast strobe, continue holding to reach the SOS signal mode. Release the button when the desired beacon mode is reached. In SOS signal mode the light will flash the letters S-O-S in Morse Code.

To exit any of these modes, simply turn the light off.

Signal/Momentary Mode
Momentary mode changes your light from constant On to squeeze On/Off. When this mode is activated the light will not stay on unless the button is pushed and held. This is very useful when carrying your light on your keys or in a bag. It also allows you to use the light as a signaling device.
To access this mode press the button rapidly 4 times, or until it the light stays on only when pressed.

To exit this mode, simply press and hold the button until the light turns off (about 4 seconds).