Flashlight Reviews

LRI Photon Rex Micro Light

provided for review by
LRI Photon Rex Micro Light is next generation rechargeable Lithium Ion battery based LED flashlight with a row of 4 LED's inline array. The four premium binned LED's make Rex extremely bright for its size. Photon Rex is similar to Photon Freedom and Photon X-Light Micro in some ways; in fact Rex is an enhancement to previous product lineup and shares Freedom UI features. What's unique about the Photon Rex is its ability to recharge from commonly available batteries. For instance a standard AA alkaline battery or a D size alkaline battery will be sufficient to recharge Photon Rex. This is mainly because Photon Rex has special inbuilt recharging circuitry. Build quality wise, the ABS plastic body offers great wear and tear resistance. LED's are protected by shields on either side of inline array. LRI Photon Rex uses premium Nichia GS LED's. The switch is made of glow in the dark soft touch rubber material. The entire LED array works in conjunction with Freedom UI features that include variable brightness, different signal modes and SOS mode. The rechargeable battery is capable of charging up to 500 times, which means if you charge your Photon Rex Micro Light twice a week, you would not need a service replacement for more than 4 years! This is just incredible. Imagine using a flashlight without replacing batteries for 4 years. Thanks to the high efficiency rechargeable Li-Ion battery. That's the LRI's commitment to environment. Future accessories will include a solar panel recharging device as well as a USB port re-charger.

Light Features:
  • Capable of recharging up to 500 times
  • Can recharge with standard AA battery
  • Premium binned Nichia GS LED Array
  • Unique single button control Freedom UI, Microcontroller (µC) based drive circuit
  • ABS body with glow in the dark button
Light Operation & Output:
Light Operation: Simple, click switch. Click once to switch on, click again to switch off. Advanced modes can be attained by holding the click switch. Let's have a detailed look at the freedom user interface mode diagram for LRI Photon Rex Micro Light.

user interface mode diagram for LRI Photon Rex Note: Photon Rex is shipped in demonstration mode. You will have to take your Photon ReX Micro Light out of Demonstration Mode by pressing and holding the button until the light turns itself off. This will take about 20 seconds.

Freedom UI: Single Button Operation:

1. Simple ON-OFF: Press/Click the button to switch ON; click the button again to turn OFF.

2. Control Brightness:
          If the light is OFF - Press and hold the button, the light level starts ramping up, release the button when desired brightness level is attained. Light will "blink" at full brightness.
          If the light is already in ON state (Max brightness) - Press and hold the button, the light level starts ramping down, release the button when desired dim level is attained. Light will blink at lowest light level.

3. For Safety Beacons: Press and hold past "blink" state. the light will start cycling through different modes. You can choose Slow Beacon, Medium Beacon, Fast Flash, or S.O.S. whenever the desired Beacon mode has arrived, simply release the button. The 4 safety Beacon modes are.
          Slow Beacon - Flashes once every 5 to 6 seconds 0.25 Hz.
          Medium Beacon - Has an on-off-on beat in one second intervals - 2 Hz.
          Fast Beacon - A very rapid strobe - 10 Hz.
          S.O.S. - Continually flashes the International Morse Code for distress.

4. Signal/Morse Mode: To enter the Morse Mode, click the button in quick succession rapidly until light starts blinking along with each click. It takes approximately about 6 clicks. You have now entered in Morse Code / Signaling mode. To exit Signal/Morse Code, simply press the button until light turns itself OFF.

The chart on left side here displays just the same thing visually to help better understanding of Freedom UI.

Below is the chart showing total output levels for Inbuilt Rechargeable Li-Ion Battery.
LRI Photon Rex
Level Inbuilt Rechargeable Li-Ion Battery
Max 450
Min 2
Light Info:
General Info
    Light Model Rex Micro Light
    Manufacturer Laughing Rabbit Inc
    Review Page & Image
 Rex Micro Light
Rex Micro Light
    Country  United States
    Review Date 2008-04-05
    Review Update 2008-04-20
Light Vitals
    Length 51 mm
    Width / Bezel Diameter 25 mm
    Width / Tube Diameter 43 mm
    Height (if applicable) 12 mm
    Weight (without battery) 15 gm
Light Source
    LED Format 5 mm
    Number of LEDs 4
    LED Name Nichia NSPW500 GS
    LED Power 0.12  Watts
Light Management
    Lens Material Acrilic
    Lens Coating (if any) None
    Lens Transperency (typical) 70
    Lumen Management Inbuilt Optic
    Material Acrilic
    Beam Type Wide with good side spill
Power Management
    Converter Type Direct Drive
    Properties Micro Controller (uC)
    Features Advanced User Interface
Batteries Supported, Output & Runtime
    Battery Size
    Nominal Voltage
    # Used
    Total Output
    Runtime to 75%
    Runtime to 50%
    Runtime to 25%
Switch Options
    Switch Type
    Switch Properties
Body Material Options
ABS Plastic
Strong, Light and Tough
Light Rating
70 70
    Build Quality
70 70
60 60
80 80
85 85
85 85
    Bang for buck
70 70
    Overall Rating
In-Depth Review & Pictures:
Packaging: LRI Photon Rex Micro Light comes beautifully packaged card board box with front windows reveling Rex Micro Light & charging port (the Micro Charge™ unit). The front side of box has the access allowing users to test the light in demonstration mode. With light in demonstration mode, you can switch ON or OFF the Rex Micro Light, you can also change the brightness setting. Rex Light will turn itself OFF in about 30 seconds. On the back side the box shows the LRI Photon Rex Micro Light internals, operational instructions, accessories, information about quality, toughness and contact address.

Inside you will find an instruction manual card (not shown in the picture), LRI Photon Rex Micro Light and the Micro Charge™ Unit.

Size Comparison: Pictured below From L to R: AA Battery, LRI Photon Rex Micro Light width wise.

Comparison same as above with Rex Light rotated sideways.

Another size comparison From L to R: Zebralight H50 Q5 and LRI Photon Rex.

Size comparison From L to R: Head on with Photon Freedom and LRI Photon Rex.

Size comparison From L to R: Head on with Photon X-Light Micro and LRI Photon Rex.

LED Comparison: On the left you can see single LED of LRI Photon Freedom Max on right is the monster 4 brilliant Nichia GS LED Array. The beam pattern is some what rectangular but smooth. LED's are considerably bright and Freedom's CS LED is no match to Rex Light.

Bezel: Let's have a closer look at the bezel of LRI Photon Rex Micro Light. Nichia GS LED's are aligned perfectly in center. LED's are cushioned with glow in the dark rubber. This cushion also help in preventing dust and water entering the light.

A view from side, LED's in Photon Rex Micro Light are protected by shields on either side. As you can see LED's sitting comfortably and protected. The shields take all the bumps protecting the LED's should the light fall the head down.

Closeup of LED of LRI Photon Rex Light Micro

Another view of head showing arrangement of LED's from a slightly different angle.

Another closeup of LED's in Photon Rex. Notice the LED Die covered with yellow phosphor and connecting gold bold wires emerging out of phosphor.

Body: LRI Photon Rex is molded from high quality ABS plastic. The construction quality is nice. Let pictures do the rest of the talking for now.

Special: LRI Photon Rex Micro Light glow in the dark pictures
Glow in the dark bezel

Glow in the dark button for Photon Rex Micro Light. The Glow button was charged with UV Light source prior to taking the picture.

Glow in the dark button for Photon Rex Micro Light. Here the glow button is charged only by the LED's. Note, the picture is overexposed and not in complete darkness.

Glow in the dark button for Photon Rex Micro Light. Same as above image but with total darkness and after 5 Minutes with same exposure settings.

Beam Shots:
Beam of light generated by LRI Photon Rex with 4 inline array LED is rectangular flood type beam. It has slight blue tone with yellowish outline. Here Beam shot Matrix shows LRI Photon Rex at Max and Min levels with internal Li-Ion Battery. All beam shots are taken at f/8 aperture with varying shutter speed.
Max Min

Extreme Closeup Pictures: LRI Photon Rex
Here are a few extreme closeup shots. The workmanship of LRI Photon Rex Micro Light is good, body built is strong. Front Top portion of LRI Photon Rex

LRI Photon Rex Micro Light Top.

Rex Micro Light back side, showing charging ports.

Rex Micro Light tail end.

Super extreme closeup of Rex Micro Light.

Super Extreme closeup LRI Photon Rex

The button on Rex Micro Light mimics finger print, thus offering very good grip.

Rex Micro Light top side.

Rex Micro Light top tail side.

Rex Micro Light charging port.

Rex Micro Light charging port, you may have noticed some micro scratches and dents; that's because the light went through heavy usage, it was dropped quite a few times and even run over by feet.

Tail end of Rex Micro Light with Rex logo stamped.

Internal Lithium Ion Battery: The runtime for LRI Photon Rex with fully charged Li-Ion internal battery on MAX light output is about 18 Minutes till 50%, considering the size of light and the total output, it sounds like a good runtime. Moreover there is a moon mode that will last upwards of 45 Minutes. Runtime for LRI Photon Rex with less output levels will be considerably more.

Buy LRI Photon Rex Flashlight at www.laughingrabbitinc.com
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