Recently, the energy resources have been decreased while the global energy demand is expected to grow rapidly. This has led the authorities associated with traffic management to seek various solutions for enhancing energy efficiency of the huge numbers of lamps used in traffic light systems. Hence, many metropolitan areas, like Istanbul, have started using traffic lights equipped with LEDs inst...

background and aims. the aim of the present study was to compare the efficacy of quartz tungsten halogen (qth) and light emitting diode (led) curing lights on polymerization of resin composite. materials and methods. a hybrid resin composite was used to prepare samples which were cured using two qth and ten led light curing sources. twelve groups, each containing ten samples, were prepared usin...

The scope of the present paper is the derivation of a merit function which predicts the visual perception of LED spot lights. The color uniformity level Usl is described by a linear regression function of the spatial color distribution in the far field. Hereby, the function is derived from four basic functions. They describe the color uniformity of spot lights through different features. The re...

Several important properties associated with light-emitting diode (LED) polymerization lights and dental materials treated using LED technology, such as compressive and flexural strength, bond strength, temperature rise, power density, and material thickness and opacity, have been reviewed in this paper.

Light irradiation plays an important role in the growth of microalgae and their nutrient composition. To elucidate effect different LED lights (red, orange, green, blue, purple, simulated sunlight, white) on main nutritional compositions Isochrysis zhanjiangensis, growth, fatty acid composition, soluble carbohydrate, protein contents were studied. The results show that I. zhanjiangensis grew fa...