An experimental setup and procedure for the evaluation of selfluminous colours viewed against both dark and luminous backgrounds is presented. Physical and visual data of self-luminous colours is gathered in order to develop a Colour Appearance Model for self-luminous colours under different viewing conditions. This model is needed for the evaluation of light sources.

Three taxa of luminous bacteria (Photobacterium fischeri, P. phosphoreum, and Beneckea spp.) were found in the enteric microbial populations of 22 species of surface- and midwater-dwelling fishes. These bacteria often occurred in concentrations ranging between 10 and 10 colony-forming units per ml of enteric contents. By using a genetically marked strain, it was determined that luminous cells e...

A two-dimensional model is used to study the effect of cell structure on the performance of PDPs. More specifically, the effect of the insertion of a floating conducting material between the dielectric layer and the MgO film on the performance of the device is investigated. The shape of the discharge power pulse is found to be significantly different in comparison with the corresponding pulse o...

We measured electroretinograms (ERGs) for the isolated short-wavelength-sensitive (SWS) cones using a substitution technique. The stimulus was a 5 Hz alternation of 460 nm and 565 nm or 490 nm and 565 nm light of equivalent photopic luminous efficiency. We used a 571 nm narrow-band adaptation field of 7000 td to improve SWS cone isolation and to suppress rod activity. The resulting SWS cone ERG...

In lighting design and architectural illumination planning simulations of luminance and illuminance distributions within scenes are performed using rendering tools such as RADIANCE. In this paper we focus on the evaluation by two action spectra other than the luminous efficiency function – the circadian action function describing the melatonin suppression and the photosynthesis action function....

We present an emissive light valve approach which possesses ~10-40X higher theoretical luminous efficiency than transmissive LCD light valves. This innovative light valve approach has been applied to a novel fluorescent display technology utilizing light wave coupling. Switchable pixelation has been achieved using an innovative electrowetting modulation method. Maximum luminance values of 950, ...

The LED light source with low power and high luminous efficiency has been used in the automotive industry. In this study, a 15W LED fog lamp with better visibility and low price was developed using the SMD type LED modules. To this end, the thermal performance of the fog lamp was optimized by adjusting the number of heat sink fins, heat pipes and the emissivity of the heatsink. As a result, the...

We present new observations made with the IRAM 30 m telescope of the J = 1−0 and 3–2 lines of HCN and HCO used to probe the dense molecular gas content in a sample of 17 local luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs). These observations have allowed us to derive an updated version of the power law describing the correlation between the FIR luminosity (LFIR) and the HCN(1−...

The physiology of light production in copepods is largely unknown. The mesopelagic copepod Gaussia princeps possesses luminous glands, each consisting of a single large cell discharging through a cuticular pore. Slow flashes external to the cuticle are triggered from excised abdomens by electrical stimulation of the ventral nerve cord. Each luminous cell contains UV fluorescent secretory vesicl...