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lm⋅W −1. In SI base units. cd⋅s 3 ⋅kg −1 ⋅m −2. Dimension. J T 3 M − 1 L − 2 {\displaystyle {\mathsf {J}} {\mathsf {T}}^ {3} {\mathsf {M}}^ {-1} {\mathsf {L}}^ {-2}} Luminous efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt in the ...
Mathematically, 1 lx = 1 lm/m 2. A source radiating a power of one watt of light in the color for which the eye is most efficient (a wavelength of 555 nm, in the green region of the optical spectrum) has luminous flux of 683 lumens. So a lumen represents at least 1/683 watts of visible light power, depending on the spectral distribution.
Fixed and adjustable 3 A buck switching regulators. f=150 kHz. LM2679 Fixed and adjustable 5 A buck switching regulators. f=260 kHz. LM61430-q1 3-V to 36-V, 3-A, Low-EMI Synchronous Step-Down Converter. f=0.2-2 MHz. LM3281 3V to 5V, 1-A, DC-DC Step-Down Converter. 3.3V-OUT(fixed) f=6 MHz. 94% efficiency at 300mA load
lm⋅s/m 3: L −3 ⋅T⋅J: Luminous efficacy (of radiation) K: lumen per watt: lm/W: M −1 ⋅L −2 ⋅T 3 ⋅J: Ratio of luminous flux to radiant flux: Luminous efficacy (of a source) η: lumen per watt: lm/W: M −1 ⋅L −2 ⋅T 3 ⋅J: Ratio of luminous flux to power consumption Luminous efficiency, luminous coefficient V: 1
The Lockheed L-100 Hercules is the civilian variant of the prolific C-130 Hercules military transport aircraft made by the Lockheed Corporation. Its first flight occurred in 1964. Longer L-100-20 and L-100-30 versions were developed. L-100 production ended in 1992 with 114 aircraft delivered.
LM317 with heat sink. The LM317 is an adjustable positive linear voltage regulator. It was designed by Bob Dobkin in 1976 while he worked at National Semiconductor. [1] The LM337 is the negative complement to the LM317, which regulates voltages below a reference. It was designed by Bob Pease, who also worked for National Semiconductor.
Apollo Lunar Module. The Apollo Lunar Module ( LM / ˈlɛm / ), originally designated the Lunar Excursion Module ( LEM ), was the lunar lander spacecraft that was flown between lunar orbit and the Moon's surface during the United States' Apollo program. It was the first crewed spacecraft to operate exclusively in the airless vacuum of space ...
NTLM. In a Windows network, NT (New Technology) LAN Manager ( NTLM) is a suite of Microsoft security protocols intended to provide authentication, integrity, and confidentiality to users. [1] [2] [3] NTLM is the successor to the authentication protocol in Microsoft LAN Manager (LANMAN), an older Microsoft product.
For example, an LM-120 1/2 ton Metro van (5,400 lb weight capacity or GVWR) with a 7 3/4 or 9 1/2 foot body effectively had the IH engine (SD-220), transmission, rearend, wheels (although with varying bolt patterns), and braking system of an L-120 pickup truck.
where: : heat flux (W/m²); i.e., thermal power per unit area, : difference in temperature between the solid surface and surrounding fluid area (K) The heat transfer coefficient is the reciprocal of thermal insulance. This is used for building materials ( R-value) and for clothing insulation .