PlexBright Head-Mounted LED Modules

At the heart of the PlexBright® Optogenetic Stimulation System are the cost-effective and powerful PlexBright Head-Mounted LED Modules for use with our PlexBright Commutators for freely behaving animals.


Plexon’s Head-Mounted LED modules provide outstanding light stability and pulse characteristics are miniaturized for placement directly on an animal’s head. Our ever-expanding series of powerful, fiber-coupled PlexBright LED Modules effectively elicit responses from several opsins targeted in neuroresearch, including channelrhodopsins (ChRs), archaerhodopsins (Arch) and halorhodopsins (NpHR).

The Head-Mounted LED modules are available in Blue (465nm), Green (525nm), Lime (550nm), and Orange (620nm)

We also offer Magnetic Head-Mounted LED Modules that include a magnetic optical rotary connector that can be used with the NEW magnetic fiber stubs to relieve the torque on the implant from rotational movements such as spinning and twirling (available in blue, green, lime, and orange).

Commutators that deliver power to the LEDs as they spin freely along with a behaving animal. These modules have recently been enhanced to feature a magnetic connection to the commutator. The new style of magnetic attachment enables faster module interchangeability. These Compact LED Modules are compatible with the PlexBright Dual LED Commutator, PlexBright Dual LED + 16 Channel Commutator for simultaneous neural recording with analog headstages, or the NEW Carousel™ Commutator for simultaneous neural recording with digital headstages.

PlexBright Starter Kits offer the initial products to get started and a 10% discount when purchased as a kit. Kits are available in four experimental designs and with either driver (the economical kit with the LD-1 Single Channel LED Driver or the fully functional kit with the PlexBright 4 Channel Optogenetic Controller with Radiant Software).

In addition to super intensity PlexBright LED Modules, Optical Patch Cables and Commutators, the PlexBright Optogenetic Stimulation System also offers the PlexBright LD-1 Single Channel LED Driver; the more sophisticated PlexBright 4 Channel Optogenetic Controller running Radiant Software; specially designed PlexBright Fiber Stub Implants; the PlexBright Light Measurement Kit; and the PlexBright Optical Fiber Cleaning Kit to safely maintain and extend the life of the fiber tips. If your experiments include freely behaving animals, you may also be interested in learning more about the CinePlex®and CineLyzer®Behavioral Research Systems.

Your Plexon Sales Engineer is available to provide additional information and to assist you in determining what configuration might be the best choice for supporting your research.

Head-Mounted LED Modules are used in conjunction with our PlexBright Commutators (for use with freely behaving animals).


Technical Specifications

Ferrule OptionsLC or FC
Weight1.5 grams
Dimensions10mm wide x 8mm tall
Available wavelengthsBlue (465nm), Green (525nm), Lime (550nm), and Orange (620nm)


PlexBright LED Power Output With Head-Mounted LED Modules

LED ModuleAt the
LED Module
At the tip of a 200/230µm, 0.66NA Fiber Stub (No patch cable required)
(Wavelength/Max Current)
Measured Output¹Measured Output¹
(Normalized Output)
Head-Mounted Blue
Head-Mounted Green

Head-Mounted Lime

Head-Mounted Orange



PlexBright LED Power Output With Magnetic Head-Mounted LED Modules

LED ModuleAt the
LED Module
At the tip of a Magnetic Fiber Stub (No patch cable required)
(Wavelength/Max Current)
Measured Output¹Measured Output¹
(Normalized Output)
Magnetic Head-Mounted Blue
Magnetic Head-Mounted Green
Magnetic Head-Mounted Lime
Magnetic Head-Mounted Orange

¹Power values are measured using pulsed stimulation (1 msec pulses)

A Plexon Sales Engineer can help you determine the best optogenetic system configuration to meet your research goals.

Most information provided by other companies will report the highest possible output power – often directly from the LED itself. Plexon is more concerned with ensuring that researchers are clearly aware of practical output. The table below provides the expected system output actually experienced by the tissue – accounting for the specific wavelength chosen, loss due to patch cable and fiber stub connections, and the Fiber Stub Implant optical fiber diameter.