Design Complex Light Regimes R package LightFitR version 1.0.0 A system for accurately designing complex light regimes using LEDs. Takes calibration data and user-defined target irradiances and it tells you what intensities to use. For more details see Vong et al. (2025) <doi:10.1101/2025.06.06.658293>. Software Depends: R (>= 3.5) Imports: utils, graphics, lubridate, nnls, stringr Suggests: knitr, rmarkdown, testthat (>= 3.0.0) Gina Vong <gywv500@york.ac.uk> Comprehensive R Archive Network (CRAN) Gina Vong [aut, cre, cph] (ORCID: <https://orcid.org/0000-0002-3913-7667>) GPL (>= 3) 2025-07-25 application/tgz https://CRAN.R-project.org/package=LightFitR doi:10.32614/CRAN.package.LightFitR