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Ceiling Dome – the light source(s) are hidden behind a translucent dome typically made of glass, with some combination of frosting and surface texturing to diffuse the light. These can be flush-mount fixtures mounted into the ceiling, or semi-flush fixtures separated by a small distance (usually about 3–12").
A flush door is a completely smooth door, having plywood or MDF fixed over a light timber frame, the hollow parts of which are often filled with a cardboard core material. [ citation needed ] Skins can also be made out of hardboards, the first of which was invented by William H Mason in 1924.
A kerosene lamp (also known as a paraffin lamp in some countries) is a type of lighting device that uses kerosene as a fuel. Kerosene lamps have a wick or mantle as light source, protected by a glass chimney or globe; lamps may be used on a table, or hand-held lanterns may be used for portable lighting.
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L08 Electric Light Quality, for quality of light fixtures, total 3 points, all light fixture, except decorative lights and emergency lights, that color rendering is equal or over color rendering index (CRI) of 90 or CRI of 80 with R9 equal or over than 50 or TM-30 of color rendering fidelity (Rf) equal or more than 78 and color rendering gamut ...
A heat sink design must fulfill both its thermal as well as its mechanical requirements. Concerning the latter, the component must remain in thermal contact with its heat sink with reasonable shock and vibration. The heat sink could be the copper foil of a circuit board, or a separate heat sink mounted onto the component or circuit board.
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