Recessed lightA recessed light or downlight (also pot light in Canadian English, sometimes can light (for canister light) in American English) is a light fixture that is installed into a hollow opening in a ceiling. When installed it appears to have light shining from a hole in the ceiling, concentrating the light in a downward direction as a broad floodlight or narrow spotlight. Most recessed fixtures are cylindrical and fit into a circular hole in the ceiling.
IlluminanceIn photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of how much the incident light illuminates the surface, wavelength-weighted by the luminosity function to correlate with human brightness perception. Similarly, luminous emittance is the luminous flux per unit area emitted from a surface. Luminous emittance is also known as luminous exitance.
SewingSewing is the craft of fastening pieces of textiles together using a sewing needle and thread. Sewing is one of the oldest of the textile arts, originating in the Paleolithic era. Archaeological evidence suggests that early humans in Europe and Asia produced garments from fur and leather clothing using bone, antler or ivory sewing-needles and "thread" made of various animal body parts including sinew, catgut, and veins.Light fixtureA light fixture (US English), light fitting (UK English) or luminaire is an electrical lighting device containing one or more light sources, such as light bulbs, and all the accessory components required for its operation to provide illumination to the environment. All light fixtures have a fixture body and one or more light sources. The sources may be in sockets for easy replacement; in the case of some LED fixtures, they may be hard-wired in place.
CookingPreparing food using heatA man cooking in a restaurant kitchen, MoroccoCooking, also known as cookery, is the art, science and craft of using heat to make food more palatable, digestible, nutritious, or safe. Cooking techniques and ingredients vary widely, from grilling food over an open fire, to using electric stoves, to baking in various types of ovens, to boiling and blanching in water, reflecting local conditions, techniques and traditions.
Contrast (vision)Contrast is the difference in luminance or color that makes an object (or its representation in an image or display) distinguishable from a background. Human vision is more sensitive to relative differences than to absolute luminance, so perceived appearance can remain fairly stable despite large changes in illumination. The maximum contrast of an image is termed the contrast ratio or dynamic range.
LightingLighting or illumination is the deliberate use of light to achieve practical or aesthetic effects. Lighting includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Daylighting (using windows, skylights, or light shelves) is sometimes used as the main source of light during daytime in buildings.
DentistA dentist, also known as a dental doctor, dental physician, dental surgeon, is a health care professional who specializes in dentistry, the branch of medicine focused on the teeth, gums, and mouth. The dentist's supporting team aids in providing oral health services. The dental team includes dental assistants, dental hygienists, dental technicians, and sometimes dental therapists. HistoryMiddle AgesIn both China and France, the first people to practice dentistry were barbers.
SurgerySurgery is a medical specialty that uses manual and instrumental techniques to diagnose or treat pathological conditions (e.g., trauma, disease, injury, malignancy), to alter bodily functions (e.g., malabsorption created by bariatric surgery such as gastric bypass), to reconstruct or alter aesthetics and appearance (cosmetic surgery), or to remove unwanted tissues, neoplasms and foreign bodies.
MedicineDiagnosis, treatment, and prevention of illnessThe Doctor by Sir Luke Fildes (1891)Medicine is the science and practice of caring for patients, managing the diagnosis, prognosis, prevention, treatment and palliation of their injury or disease, while promoting their health. Medicine encompasses a variety of health care practices which evolved to maintain and restore health through the prevention and treatment of illness and infection.Surgical lightingA surgical light – also referred to as an operating light or surgical lighthead – is a medical device intended to assist medical personnel during a surgical procedure by illuminating a local area or cavity of the patient. A combination of several surgical lights is often referred to as a “surgical light system”.*As an Amazon Associate I earn from qualifying purchases.