mkklion.blogg.se - Dark moonlight sky

#DARK MOONLIGHT SKY FULL#
#DARK MOONLIGHT SKY SERIES#

^ a b c based on this table of exposure values, assuming a reflected-light meter calibration constant of 12.5 cd.

#DARK MOONLIGHT SKY SERIES#

^ "Characteristic and comparison between LumiNova G Series and conventional pigment" (PDF).

first decay graph of section 3.4 – The Afterglow. University of Ljubljana, Faculty of Electrical Engineering, laboratory of Lighting and Photometry. "CIE Mesopic photometry – implementation for outdoor lighting" (PDF).

^ a b c d based on Orders of magnitude (illuminance), assuming a typical photographic scene has the same reflectance as an 18% gray card.

^ a b c d e f g h "Lighting Application".

University of Pennsylvania Medical Center, Department of Neuroscience. Proceedings of the National Academy of Sciences of the United States of America. "Interference of moonlight with the photoperiodic measurement of time by plants, and their adaptive reaction".

^ Bunning, Erwin Moser, Ilse (April 1969).

^ "Petzl reference system for lighting performance".

^ a b c d e Paul Schlyter, Radiometry and photometry in astronomy FAQ (2006).

#DARK MOONLIGHT SKY FULL#

Typical photographic scene in full sunlight įrosted incandescent light bulb įilament of a clear incandescent lamp Typical photographic scene on overcast day Monitor white in the sRGB reference viewing environment Typical photographic scene at sunrise or sunset Phosphorescent markings on a watch dial after 1 h in the dark įloodlit buildings, monuments, and fountains Īpproximate mesopic/ photopic threshold Typical photographic scene lit by full moon Īpproximate scotopic/ mesopic threshold This section lists examples of luminances, measured in candelas per square metre and grouped by order of magnitude. Shade illuminated by entire clear blue sky, midday Sunrise or sunset on a clear day (ambient illumination) Starlight clear moonless night sky including airglow Įxtreme of darkest storm clouds, sunset or sunrise Starlight clear moonless night sky excluding airglow To help compare different orders of magnitude, the following list describes various source of lux, which is measured in lumens per square metre. This ensures that the bulb is dark sky friendly.As visual perception varies logarithmically, it is helpful to have an appreciation of both illuminance and luminance by orders of magnitude. When buying new lights check if the packaging has the international dark sky fixture seal of approval. This helps protect you from some sources of blue light. Apps such as F.lux, Lux, twilight, and night shift (iOS) filters out blue light from the screen come nighttime. You can use blue blocking glasses when using electronic devices with screens. Therefore, use warmer lights (3000K or less) because they have the least effect on the night sky. The higher the color temperature the more blue it has. Since blue light can simulate daylight and has the most strength, it easily brightens the night sky. The light’s temperature is a measurement of lighting. You can look at the light’s packaging for its color temperature. Use lighting with 3000 Kelvin color temperature or below. Red light compared to the other colors in the spectrum are the weakest, while blue is the strongest. To protect yourself from blue light, use dim red lights.