SearchLight™ Spectral Plotting Tool
The Premier Modeling Resource for Fluorescence Microscopists and Optical System Designers

Semrock SearchLight Screen

Start using SearchLight! (this link will open a new window for SearchLight on the Semrock website)

SearchLight is a free, online spectral plotting and analysis tool that allows fluorescence microscope users and optical instrument designers to model & evaluate the spectral performance of fluorophores, filter sets, light sources, and detectors as components of an overall system. Its intuitive user interface makes it easy to manipulate spectral component specifications and plot spectral results. The System Calculator allows the user to quantify system metrics including signal, SNR, and bleed through; as well as to compare various system configurations against each other.

Any number of spectra may be plotted simultaneously, and an entire graphing session sent to colleagues for collaboration using the “Share” feature. SearchLight sessions can also be saved into your personal account for future use.

SearchLight contains an extensive library of over 750+ fluorophores, 100+ light sources, more than a dozen detectors, and Semrock’s entire library of filters and filter sets. “MyData” allows you to upload your own custom datasets for any components not currently included as a selection choice.

  • Evaluate and optimize your system configurations
  • Save/Share/Export your results for better collaboration
  • Take advantage of the regularly updated databases
  • Save time in the lab and make every photon count with Searchlight!

To get you started, have a look at this short video to help guide you through the component selection and results viewing process.

We hope you find this online tool valuable and encourage you to send us an email and share your comments to


New SearchLight App for your Mobile Device

Semrock SearchLight App

SearchLight App available for iPhone & iPad. Advanced features for data management as well as simulations can be accessed using

Semrock now offers a SearchLight App available for iPhone & iPad.
You have all the popular features available from the SearchLight plotting tool right at your fingertips anytime, anywhere.

  • Access SearchLight offline even without internet connectivity
  • Save your Sessions locally on your iPhone & iPad when offline
  • All data syncs with your on-line account when you reconnect

Downloading this App is free and easy. Simply search for “Semrock” in the App Store and follow the download instructions for SearchLight.


iPad App

iPad App




iPhone App

iPhone App