CoolLED led the introduction of LED illumination for fluorescence microscopy, helped establish it as an industry standard, and is pushing the boundaries of what LED technology can do today.
Since introducing the world’s first commercially available LED illumination system for fluorescence microscopy in 2006, we’ve built over 20 years of specialist experience in designing and manufacturing high-performance LED illumination systems.
Today, our technology is used on approximately 20,000 microscopes worldwide, with applications extending far beyond traditional fluorescence microscopy. From high-speed, multichannel imaging to advanced OEM solutions spanning UV, visible, near-infrared (NIR) and short-wave infrared (SWIR) wavelengths, our technology supports an increasingly diverse range of scientific and industrial applications.
Designed and manufactured in the UK, our LED illumination systems combine advanced optical engineering with the reliability, flexibility and expert support that customers around the world have come to expect from CoolLED.
Why choose CoolLED?
Proven expertise: Over 20 years of specialist LED illumination development and a history of technological firsts.
Technology that keeps advancing: From fluorescence microscopy to configurable UV, visible, NIR and SWIR illumination for demanding OEM applications.
Quality you can depend on: UK manufacturing, ISO 9001 and ISO 14001 certification, and over 99% on-time delivery.
Expert support and sustainability: Friendly, knowledgeable technical support, mercury-free illumination and independently verified environmental credentials.
LED Light Sources
Find the right LED Illumination System for your microscope, from routine fluorescence imaging to demanding multichannel applications, with reliable performance, precise control and straightforward integration.
From life sciences and advanced microscopy to semiconductor inspection and metrology, discover configurable OEM illumination solutions spanning UV, visible, NIR and SWIR wavelengths.
Discover how CoolLED technology is used across scientific and industrial applications, with research papers, application notes, testimonials, videos and practical technical guidance to support your work.
It was very easy to collaborate with CoolLED. You were open to hearing our requirements and putting together a customised solution. You can rely on the people at CoolLED. That's the trust factor.
Márton MayerScanner RX Product Development Manager, 3DHISTECH
9 months from starting development to being in market with the Eagle G5 is remarkable. Our collaboration has established CoolLED as our preferred illumination partner.
Benzion SenderEVP R&D, Camtek
Developing a 10-channel multiplex imaging system meant bringing together several technologies and overcoming technical challenges, particularly when extending into the near-infrared. Working closely with CoolLED has been a true collaboration, and together we successfully delivered a groundbreaking 10-channel solution for spatial biology.
Per Fogelstrand, PhDCEO, Kromnigon
The transition away from mercury-based lighting to LED technology has been a really positive step for us. The CoolLED website, along with the helpful technical guidance provided by the CoolLED team, made it much easier to understand the options and build a strong case for change. Moving to LEDs has improved consistency, performance and sustainability, and supports our ongoing commitment to safer, more efficient working practices.
Dr Debbie WilkinsonMicroscopy and Histology Core Facility, University of Aberdeen
CoolLED light sources are user-friendly, offering versatile control options and delivering bright illumination across a broad spectrum of wavelengths. Their customer support is exceptional, consistently providing prompt and comprehensive responses to any inquiries.
Kevin ChampionService Director, K-Tec Microscope Services Ltd
We are happy with the pE-400max as it's super-compact, bright and quiet! I forgot that it was turned on. Also, no more changing expensive and environmentally hazardous mercury bulbs. We look forward to some nice imaging days ahead.
Dr Eisuke KoyaSchool of Psychology, University of Sussex
We are really happy with it. Overall, I found it very easy to install and operate. The intensity of illumination is great and I like that it is highly adjustable. There is no warm up/cool down which makes things easier for all users. I look forward to reduced maintenance with the long lifespan of the LEDs and no bulb replacements. No complaints really! I would definitely recommend the system to others as superior to standard mercury lamp illumination.
Adam VogrinTechnical Officer, RMIT University
The customer service at CoolLED is phenomenal! Justyna was amazing with product feedback. I have NO hesitation recommending CoolLED for their products and service. Simply fantastic!
Rama GullapalliAssistant Professor, University of New Mexico
The Cy5 (635 nm) LED in the pE-400 Series is a game changer and they also offer massively improved YFP excitation too. They are fantastic products!
Bob HartleyManaging Director, Alba Scientific
Thank you all for your helpful support, prompt assistance and good communication – and also patience and understanding as we dealt with some administrative delays on our side. I wish all companies had a support team as good to deal with as CoolLED!
Suzanne CrottySenior Technical Officer, BioSciences Institute, University College Cork, Ireland
My team told me that the pE-800fura is a very good light source – powerful and suitable for multi-purpose applications. The same for our academic collaborators who clearly saw the difference compared to their aging light source.
Olivier ChanteuxSales Manager, Inscoper
The pE-300white has been a great asset for a core facility. It has meant less time spent changing bulbs (so less downtime to the user and more productive time for ourselves) and no longer worrying about users turning the light source on and off throughout the day as multiple users come and go. The controllable intensity has also proved highly popular with users who are now able to set the minimum light level required to scan their samples and minimise the risk of phototoxic damage and bleaching to their specimens.
Peter O'TooleHead of Imaging & Cytometry, University of York
We chose the CoolLED light source with our live cell imaging system because we need a fluorescence light source that is efficient, easy to use and has a very bright and robust signal for fluorescence – but is also incredibly gentle on cell samples. Our system is designed around a lack of phototoxicity, so when using fluorescence with holotomography, we really need the ideal excitation that keeps cells happy, but shows exactly what is labelled.
Paul CarmanNanolive
We needed an easy to install, triggerable, intensity-modulated light source. An LED is by far the easiest and cheapest solution. Furthermore, small latencies between triggered light pulses are crucial for the analysis of the kinetics of measurements. We used the CoolLED pE-300ultra, which meets these requirements. Another great advantage of this product lies in its versatility for use in upcoming experiments covering different wavelengths. Its flexibility allows the performance of very complex experimental protocols.
Dr Max AnstotzUniversity Medical Center Hamburg-Eppendorf, Institute of Neuroanatomy
