Q:The LED rechargeable lamps can charge while lighting? The reason?

resistance capacity is determined the capacity of capacitance current, and the charging current is very small, generally in 1 u for many, the charging current is about 70 ma, 13, and light bead is usually a 20 ma, that is the lamp bead is 260 ma, so four hours to point to a hour, if charge while using, then charge electric light enough to use, the end result is the battery voltage drops to light bead, is about 3.2 V, that is to say the battery will discharge, after filling is filling in a difficult, because with lead-acid batteries.

Q:LED the desk lamp that shield an eye to choose good warm light or white light is good?

All said no white or warm white light, how still stubbornly say which good? So you say like fluorescent lamp of white or yellow incandescent lamp? Want to that is that, it's all the same eyes, no better.

Q:Led desk lamp and common desk lamp which is good

The launch of the white light LED light source can form mainly consisted of 450 ~ 455 nm wavelength of the blue light stimulate phosphor powder, including lower wavelength firing ability are more strong. Usually LED lights factory within a 500 - nm wavelength control, generally is 450 ~ 455 nm or 455 ~ 460 nm, belong to the strongest radiation damage extents

Q:LED lamp in the 4 v lead-acid battery charging problem!

Dedicated charger generally 3 ~ 5 hours, about 200 ma small battery charging current, automatically stops charging. White led lamp voltage 3 v or so, so light is not on the discharge is lower than 3 v

Q:LED desk lamp, very bright, when buy later with more and more dark

Not mass, domestic import LED with diode is also good, domestic doesn't (work well)

Q:Do LED lamps really protect your eyes?

But now on the market the LED desk lamp is very much also, choose when to pay attention to whether can face light source, gradient dimmer. TOPDAY use is good

Q:How to choose the night reading reading lamp

The desk lamp that shield an eye, the type of LED desk lamp that shield an eye of warm color, it is best to solar energy, no glare, no flicker, long time reading will not cause eye fatigue. Solar panels will absorb sunlight during the day to recharge, desk lamp power.

Q:Do leds have ultraviolet radiation

LED is characterized by single band, the wavelengths are generally above is 390 nm, uv to less than 380 nm, so there is no uv components

Q:Led lamp, good point light source or surface light source

Not good surface light source,, the advantage is that the good anyway

Q:How to distinguish whether the led lamps and lanterns glare, is there a standard?

Wu caused cause people watching and watching! If has the attention of people is a bad light. The visual environment unfriendly! General LED panel light is good. Problem is that there are a lot of high-power lamp bead or COB integrated chips into the glare of lamps and lanterns is very serious!!!