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LED retrofit equipment that match PAR lamp dimensions is made by some manufacturers. As with the case of LED MR lamps, LED PAR lamps generally use an array of individual LED elements that are unsuitable for reflector operation. Nevertheless, some degree of beam control can be obtained with aperture or lens, and LED PAR 38 replacements with a 40 ...
The Renault 20 (R20) and Renault 30 (R30) are two executive cars produced by the French automaker Renault between 1975 and 1984. The most upmarket and expensive Renaults of their time, the two cars were almost identical with regard to sheet metal and mechanicals; the R30 was the larger-engined and more expensive of the two.
AN/TPN-12 GCA/PAR. A traditional PAR flight inspection procedure is performed without a navigation signal available to compare directly to a truth reference. A traditional PAR is flight inspected by comparing written notes between two observers, one taking notes at a truth reference system such as a theodolite and the other observer taking notes while observing the radar console; see ICAO ...
The R30 was a New York City Subway car model built by St. Louis Car Company from 1961 to 1962. The cars were a "follow-up" or supplemental stock for the B Division's R27s and closely resembled them. A total of 320 cars were built, arranged in married pairs .
Historically, one of the most conspicuous differences between UN and US regulations was the design and performance of headlamps. The Citroën DS shown here illustrates the large differences in headlamps during the 1940-1983 era when US regulations required sealed beam headlamps, which were prohibited in many European countries.
Par-baking: Baking the pie crust partially before adding the filling. An easy memory trick: par -baking refers to par tially baked. As for the term “blind,” food historians aren’t quite sure ...
IBM originally released the Thinkpad R Series (Starting with the R30) as the mid-range mainstream model of the ThinkPad brand. It was conceived as a laptop "for the business executive working on a budget - a road warrior with an office network whose out-of-office work rarely goes beyond running PowerPoint shows or demonstrating spreadsheets". [ 3 ]
PAR as described with PPF does not distinguish between different wavelengths between 400 and 700 nm, and assumes that wavelengths outside this range have zero photosynthetic action. If the exact spectrum of the light is known, the photosynthetic photon flux density (PPFD) values in μmol⋅s −1 ⋅m −2 ) can be modified by applying ...