Constructed from anodized aluminum, this LED ring light housing features four 4-40 tapped holes that are compatible with our Ø6 mm ER cage rods, allowing for integration with 30 mm cage systems. The housing also features three setscrews on the sides for interfacing with various camera lenses and high-magnification zoom lens systems (as seen in the photo in the bottom right), which can be secured using a 5/64" (2.0 mm) hex key or balldriver. An M60 x 1.0 external thread at the head of the ring light gives the option of attaching various elements such as custom filters or diffusers.

To fully support the max optical power of the LED you intend to drive, ensure that the max voltage and max current of the driver are equal to or greater than those of the LED.

We recommend using a tracked service for returns, please note we only pay return postage if the goods are proved faulty.

Backorders will be delivered as quickly as possible (Usually within 28 days) we will notify you by email of an expected delivery date.

Driver OptionsThorlabs offers four drivers compatible with this LED ring light: LEDD1B, DC40, UPLED, and DC2200. See the LED Drivers tab for compatibility information and a list of specifications. The UPLED, DC40, and DC2200 drivers are capable of reading the current limit from the EEPROM chip of the connected LED ring light and automatically adjusting the maximum current setting to protect the LEDs. The DC40 LED driver can provide drive currents with up to a 5 kHz modulation when supplied with an external modulation signal. While the DC2200 driver is capable of modulating frequencies up to 250 kHz, the LED ring light must not be modulated at or above 9 kHz.

If you need to return something or the goods are faulty please contact us on +44 (0) 1727 600102 or email [email protected] before sending anything.

What is the 3W Small LED Downlight, and what are its applications? The 3W Small LED Downlight is a compact and energy-efficient lighting solution designed to provide focused illumination. It is commonly used for accent lighting in residential, commercial, and hospitality settings. The mini micro spotlight is ideal for highlighting specific areas, artworks, displays, or architectural features.

I have more questions not covered here. How can I get in touch with Sera’s support team? For any additional inquiries or support, please contact us here.

Can I use the 3W Small LED Downlight in a recessed setting? Yes, this mini micro spotlight is suitable for recessed installation, providing an unobtrusive and seamless appearance.

For convenient connection to the drivers listed below and on the LED Drivers tab, the LED ring light has a connection cable with an M8 connector; see the Pin Diagram tab for the M8 connector pin information. This LED ring light also features an EEPROM chip which stores information about the LED (e.g., current limit, forward voltage). When controlled by a Thorlabs UPLED, DC40, or DC2200 LED driver, this data can be used to implement smart safety features.

Is there a warranty provided for the 3W Small LED Downlight? Yes, we offer a standard three year warranty for this product.

What colour options are available for the 3W Small LED Downlight? The 3W Small LED Downlight is available in warm white and cool white. Warm white (3000K) provides a cosy ambiance, cool white (4000K) offers a neutral and crisp lighting effect.

Is the 3W Small LED Downlight suitable for outdoor use? No, this product is designed for indoor use only. It is not rated for outdoor conditions and should be installed in dry indoor spaces.

Thorlabs also offers a range of unmounted, mounted, collimated, and fiber-coupled LEDs that are designed for a variety of applications, including microscopy, illumination, and measurements. For questions on choosing an appropriate LED and to discuss mounting requirements, please contact Tech Support.

This small 3W mini LED downlight is fantastic. Ideal for those small areas that are limited with space, or large areas that require a low light level.  They are similar in size to the old MR11 Style (Slightly Smaller).

What is the beam angle of the 3W Small LED Downlight? The mini micro spotlight has a beam angle of approximately 36 degrees, allowing for precise and focused illumination.

This tab includes all LEDs sold by Thorlabs. Click on More [+] to view all available wavelengths for each type of LED pictured below.

You will require you original order details, if you did not purchase direct please contact your supplier for assistance.

At Sera Technologies we are proud to offer high quality products at a fair price, with many available for next day delivery.

Thorlabs' LED Ring Light Source consists of 40 individual broadband, daylight white LEDs in a ring-shaped array with a Ø0.99" (Ø25.1 mm) clear aperture. By angling the LEDs, this ring light illuminates areas from 50 mm to 300 mm along the emission axis that can then be viewed through the clear aperture, making it ideal for machine vision applications.

The diagram to the right shows the male connector of the LEDRW40 Ring Light. It is a standard M8 x 1 sensor circular connector. Pins 1 and 2 are the connection to the LED. Pin 3 and 4 are used for the internal EEPROM. If using an LED driver that was not purchased from Thorlabs, be careful that the appropriate connections are made to Pin 1 and Pin 2 and that you do not attempt to drive the LED through the EEPROM pins.

Delivery times are approximate, please do not book and trades until you have a confirmed delivery date, or have taken delivery.  We do not accept liability for any missed delivery dates, direct or consequential.   As per our terms and conditions.

* Next working day – Orders are processed Mon-Fri only and must be place by 1pm.  Orders placed on a Friday after 1pm will not be process until Monday and therefore delivered Tuesday.

What are the key features of the 3W Small LED Downlight? The 3W Small LED Downlight boasts several notable features, including:

These downlights are quick and easy to install and come supplied complete with LED Driver.  With a 36° beam angle and a CRI >85 they provide a nice high quality spread of light at  a 4000K (Natural White) or 3000K (Warm White) Colour temperature.

White Light LEDsThis illuminator is a daylight white LED ring featuring a broad spectrum that spans several hundred nanometers; see the table to the right for a typical output spectrum. It has a correlated color temperature 5500 K, which indicates that the color appearance is similar to a black body radiator at the same temperature. In general, warm white LEDs offer a spectrum similar to a tungsten source, while cold white LEDs have a stronger blue component to the spectrum; daylight white LEDs provide a more even illumination spectrum over the visible range than warm white or cold white LEDs. To discuss LED ring lights with other correlated color temperatures or nominal wavelengths, please contact Tech Support.