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Study desk lamp high-power led is more appropriate
- Preferred the desk lamp of dc, because traditional 220 v ac 50 hz residual current fluctuations, causing light stroboscopic phenomenon. Stroboscopic is easy to cause eye fatigue, vision loss, deepen myopia. And preferred light yellow light, the light is warm, warm and comfortable, stable, not dazzling. Another is to see whether there is ultraviolet (uv) radiation.s
How to charge the LED lamp
- Lead-acid batteries used in dozens of pieces of low-grade called students or children desk lamp, rechargeable light most of the products will not change color, usually from a few hours to ten hours. Lead-acid battery charging requirement after filled with a floating time state, with the changed the user capacity and circuit design is difficult to grasp, because charging time short, filling is too long to form a rechargeable battery life shortened, theonly low-grade products without charging protection circuit, only carefully study the product description. Rough judgment: try every half hour after 2 hours filling light observation (do not charge while light), and if no longer increases should be full of light is the brightest and desk lamp brightness, floating charge time same again can Hope to adopt. thank yous
Long amount of led desk lamp can plug the power cord with straight?
- Conventional LED desk lamp inside is equipped with LED constant current power supply. Can be used directly by stores
LED bulbs, use in the home, have harm to the eyes?
- If you were home It is estimated select monochrome leds In theory, no harm But this thing who guarantee Don't recommend that you get that thing more difficult What you have to buy the control cards
Of tubes is said to be good, and some say good leds, which is really good
- I'm not professional, I think the lamp that shield an eye is a concept. It doesn't matter. Conditional or get a LED, more fashionable. A long service life, the power supply is not bad, can be used for the rest of your life. Strong, not easy broken. Finally is integrated packaging, light emitting area is relatively larger, and no more light of shadow.s
The lamp that shield an eye is after the light lamp or led the good
- LED you to choose natural white warm white (neutral) is not dazzlings
LED lamp circuit of current more conference appear what problem
- LED current assembly LED life expectancy, calorific value is big, long droop decay quickly makes the current big but light from the darkness, also is actually short service life. String or depending on the design of the circuit. The string of reasonable and important. LED type belongs to the current control device, it is recommended that the concatenated as much as possible, control current. But the list of much needed voltage too much is bad for safety. When the number of string reaches the corresponding voltage should be increased and accordingly. Such as lamp had better control transformer within the safety voltage is better, after 24 v, for example, the pressure drop of about 3 v LED, and the best in a 6-7 more appropriate, the branch with current constant flow control device for the LED work, the more number of lights, and the same number again with constant current control, this is more reasonable.s
Want to buy the university dormitory with plug-in study desk lamp, LED the good good or tubes
- Desk lamp tubes are mostly warm color, look more comfortable. And lit a lamp light up an LED to many difficulties, complex circuit, I help students took a few, internal ballast work are good.s
Specifications and details about dimmable led downlight
- A dimmable led downlight company was founded by a group of senior engineers in electronics, structure,thermal dissipation and safety standard. This kind of company is intended to p...
How much does a traffic light cost
- I think, any traffic police know: how much does a traffic light cost. Now in almost every crossroads, all around are hung with red, yellow, green, three traffic lights of color, it...
Have you ever used of emergnecy vehicle lighting
- Emergnecy vehicle lighting can be used on Police,Fire engine, Ambulance, Sprinkler, Truck , Security Vehicles, Construction Vehicles, Emergency Vehicles etc.The product can be moun...
What's the advantages of motion sensor outdoor lighting
- There are many advantages of motion sensor outdoor lighting:such as Sensor sensitivity Horizontal angle 100°Vertical angle 60° Distance 4 M. The 6 LED motion sensor light is desi...
What's the advantages of led strobe light
- Led strobe light can be used at Truck, bus, off road vehicle, atvs, boat, engineering vehicles(excavator,treedozer,road roller,bulldozer,crane and mining truck etc.), special vehic...