Light is one of the main drivers of the circadian system. Light enters the eyes and is transferred to the suprachiasmatic area of the brain which regulates different physiological rhythms throughout t...

Human Centric Lighting (HCL) and Circadian Parameters For hundreds of thousands of years, humans grew up under natural light which varied its intensity and colour temperature based on the time of day/...

Investigating the Atmosphere with UAV Technology and the Lighting Passport smart phone spectrometer Figure 1: Sunset over the Gulf of Mexico documented by a Power Egg X unmanned aerial system Recently...

The UV region of electromagnetic radiation extends from 200-400 nm and is divided into UVA. (320-400 nm), UVB (290-320 nm) and UVC (200-290 nm). Below 200 nm the radiation is absorbed by air molecules and hence it is called vacuum Ultraviolet since one needs to pull a vacuum to observe...

In this white paper, it is proposed to replace the Lighting Passport [1] High Lux model which is capable of measuring illuminances up to 200,000 lux with a Standard Pro model and a neutral density filter coupled to the aperture. The High Lux model has been discontinued and the Standard...

UV disinfecting lamps have been the hot topic these days in the fight against COVID-19. Many hospitals and long term care facilities have been using UVC [1] disinfecting lamps in the form of upper room germicidal UV lamps [2] (GUV), in ducts, stationary units or mobile robotics units to disinfect...

* TM-30-18 technote * An earlier technote described TM-30-15 technical memorandum and its advantages over the CIE colour rendering method [Reference 1, Reference 2]. Over the course of the last year, IES’s colour committee has made some changes to this memorandum to make it more compatible with CIE standards. Three...

*The Lighting Passport smart phone spectrometer was an essential tool for the research and climate studies conducted for this book series. This piece of scientific equipment allows us to test multiple environmental parameters all at once, combine the data and observe the aspects of these high altitude cloud forest ecosystems...

Laguna Caliente inside the active crater of the Poás Volcano and associated thermal image of the lake 8,885 feet or 2,708 meters in altitude Two important tools which were used here up on the Poás Volcano were the Lighting Passport smartphone spectrometer thermal imaging cameras, both of which helped me...

Artificial Light Balance for growing different varieties of tomatoes in different environments Rez Mani 1* , Ian Godfrey 2 1 Allied Scientific Pro, 815 Blvd de la Carriere Office 203, Gatineau, QC, J8Y 6T4, Canada 2 University of South Florida, Tampa, Florida, USA Corresponding author: None [1] rmani@alliedscientificpro.com , Tel:...

Spectrometer, spectro-radiometer, spectro-photometer, photometer, radiometer What is the difference? Those who deal with spectroscopy and light measuring equipment sometimes wonder what are the differences between a spectrometer, a spectroradiometer, a spectrometer and a photometer. Understanding the differences are important for a particular application so that  funds are not wasted on...

Integrating Sphere Applications** * An integrating sphere is a spherical chamber whose internal surface is coated with highly reflective diffusing material. It has an input port where lamps can be inserted and an exit port where detectors can be installed. There are several applications that require the use of an...