Constant illumination
4 papers6 findings
- 2 independent labs in 1 country
- Animals4
Outcomes
1Lifespan
downin rats3
3 studies
Lifespan
downin rats3
Constant illumination shortens lifespan in rats.
“constant exposure or natural lighting involved accelerated aging as evaluated by coefficient of homeostatic stability and survival curves shifting to the left.”
Animalsconstant illumination or natural lighting in the North-West of Russiamales
Voprosy onkologii1 Jan 2008
Constant illumination shortens lifespan in rats (-13.5% mean lifespan in constant, -25.5% in natural).
“The mean life span of animals exposed to constant or natural illumination decreased by 13.5 and 25.5%”
Animalsexposed to constant or natural illuminationfemales
Bulletin of experimental biology and medicine1 Dec 2007
Constant illumination shortens lifespan in rats (shorter mean (13.5%), maximum by 9 months).
“Constant and North-West lighting involved premature aging, shorter mean (13.5 and 25%) and maximum life span (by 9 and 7 months, respectively)”
Animalscompared with standard lightingfemales
Lighting effect on spontaneous tumor development in female rats
Voprosy onkologii1 Jan 2007
Associations
2Spontaneous tumors
upin rats2
2 studies
Spontaneous tumors
upin rats2
Constant illumination raises the risk of spontaneous tumors in rats.
“Permanent illumination promoted the development of spontaneous tumors in comparison with the standard photoregimen.”
Animalsmales
Bulletin of experimental biology and medicine1 Apr 2008
Constant illumination raises the risk of spontaneous tumors in rats.
“and a significant increase in spontaneous tumor development rate as compared with standard lighting.”
Animalscompared with standard lightingfemales
Lighting effect on spontaneous tumor development in female rats
Voprosy onkologii1 Jan 2007
Neoplasm
upin rats1
1 study
Neoplasm
upin rats1
Constant illumination raises the risk of neoplasm in rats.
“Constant illumination was followed by a significantly faster spontaneous tumorigenesis as compared with standard lighting.”
Animalscompared with standard lightingmales
Voprosy onkologii1 Jan 2008