Fluorescent lamp simulating spectral distribution of natural outdoor light

The Spectral Distribution of Firefly Light

The in vivo emission spectra of sixteen species of Jamaican fireflies and four species of American fireflies have been measured with a photoelectric recording spectrometer. A simple technique of stimulation with ethyl acetate vapor was found to elicit bright continuous emission over a period of several minutes. Although the luciferin-luciferase cross-reactions were positive in all cases tested,...

The Spectral Distribution of Firefly Light. II

The in vivo peak emission wavelengths of bioluminescence are reported for 15 species of American fireflies. A spectrophotometric study of the dorsal light organs of 155 specimens of the Jamaican firefly Pyrophorus plagiophthalamus showed three distinct color distributions with peak emission wavelengths at 550.1 +/- 1.5 mmicro, 556.8 +/- 1.4 mmicro, and 562.4 +/- 1.0 mmicro. Similar spectral mea...

Fiat Lux: A Fluorescent Lamp Tkansceiver

The prevalence of electric discharge illumination has led us to consider ways to use discharge lamps for communication. This paper describes an optical transceiver system which transmits by modulating the lamp arc. The prototype power electronic lamp ballast uses a pulse frequency modulation scheme which ensures no perceptible flicker.

Visual Performance as a Function of Spectral Power Distribution of Light Sources at Luminances Used for General Outdoor Lighting

The need to provide outdoor lighting for orientation, identification, and safety at a cost that is reasonable in terms of both dollars and energy has resulted in the use of light sources that differ significantly in spectral power distribution from those used in interiors and for which almost all data on visual performance have been accumulated. Furthermore, the illuminances used in most outdoo...

Fluorescent Lamp Modelling for Voltage Fluctuations