How much LED bulbs need to meet the brightness requirements of replacing traditional 40W incandescent lamps? Ledinside made a series of investigations based on the luminous flux of the products on the market. The brightness of 40W incandescent bulbs should be at least 450 lumens, while European and American lighting manufacturers such as: Philips, General Electric (GE), Toshiba, Sharp and South Korea's big manufacturer, LG (LG) have been inspected to meet the standard requirements, which is enough to replace the traditional 40W incandescent brightness requirements.
At present, there are many LED bulbs on the market that can be used to replace 40-watt traditional incandescent bulbs. How much does the amount of illumination need to meet the brightness requirements of replacing traditional 40W incandescent lamps? LEDinside said that the efficiency of traditional light sources such as incandescent lamps is about 11 per watt. 12 lumens or so, that is to say, a 40W incandescent bulb should be at least 450 lumens. LEDinside examines the brightness specifications of representative LED bulb manufacturers around the world, and investigates the luminous flux label. Among them, European and American lighting manufacturers such as Philips ( Philips), General Electric (GE), the two companies claim that LED bulbs equivalent to 40W conventional bulbs, including Philips' 8-watt Master LED bulb and GE's 8-watt 62180 LED bulbs, with brightness of 470 lumens and 450 lumens respectively. , all meet the replacement brightness requirements.
Japan's big manufacturers, whether it is Toshiba's 7.2-watt LDA7L or Sharp's 7.8-watt DL-LA42L, its commercial brightness specifications are also 485 lumens, in line with the guidELine specifications of the Japan Electric Ball Industry Association.
South Korea's big factory LG (LG) launched the model LB08D830L0A and 7.5W LED bulbs in place of replacing 40W incandescent lamps in May. After inspection, it also lived up to expectations. Hanfang Samsung 4.4 watts of merchandise, its brightness specifications are 270 lumens of warm white light respectively. With 320 lumens of cool white light, the brightness specifications are not as expected.
EcoSmart, LEDON and Feit Electric also launched LED bulbs that claim to replace 40W incandescent lamps, including Ecosmart's 8.6-watt LED bulb (Model: ECS 19 WW 120), LEDON's 6W product and Feit Electric's 6.5-watt LED bulb (A19/HP) /LED), the survey shows that their luminous flux is still somewhat different from the 450 lumens target value.
As for Osram's 8W LED bulbs, which can be used to replace traditional 40-watt incandescent bulbs, this product includes both cool white and warm white, with brightness specifications of 450 lumens (cold white) and 345 lumens (warm white). ).
When the manufacturer's product standard is different, when purchasing the LED light bulb, in addition to paying attention to whether it can replace the 40W traditional light bulb, it must also pay attention to whether a certain luminous flux is reached.
Small computer system interface (SCSI) is an independent processor standard for system level interfaces between computers and intelligent devices (hard disks, floppy drives, optical drives, printers, scanners, etc.). SCSI is an intelligent universal interface standard.
SCSI-3
In 1995, the more high-speed SCSI-3, called ultrasci, was born, and the data transmission rate reached 20MB / s. It increases the synchronous transmission clock frequency to 20MB / s and improves the data transmission rate. If 16 bit wide mode is used, the data transmission rate can be increased to 40MB / s. This version of SCSI uses a 68 pin interface, which is mainly used on hard disks. The typical characteristic of SCSI-3 is that the bus frequency is greatly increased and the signal interference is reduced to enhance its stability.
There are many models of SCSI-3. Ultra (FAST-20) has a transmission frequency of 20MHz, a data bandwidth of 8 bits and a transmission rate of 20MBps
Ultra wide has a transmission frequency of 20MHz, a data bandwidth of 16 bits and a transmission rate of 40mbps
The transmission frequency of ultra 2 is 80 MHz, the data bandwidth is 16 bits, and the transmission rate is 80 Mbps
The transmission frequency of ultra 160 is 80 MHz, the data bandwidth is 16 bits, and the transmission rate is 160 Mbps
The transmission frequency of ultra 320 is 80MHz, the data bandwidth is 16 bits, and the transmission rate is 320mbps
The transmission frequency of ultra 640 is 160MHz, the data bandwidth is 16 bits, and the transmission rate is 640mbps
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