Can I Take Any Blue LED Lamp and Grow?or Are There Some LEDs Special for Growing?

yahoo search is a good tool for that question

1. Voltage, Current, LED lamp question...?

Where did the 50 amps figure come from? (You are not confusing it with 50Hz, are you?) To drive a current I down a LED with forward voltage V, a rule of thumb is to start with a voltage 4 times V, and connect the LED on series with a resistor 3*V/I. Yes, just a rule of thumb. The forward voltage quoted is only a typical value, and will vary from one LED to the next. Using a higher supply voltage and a series resistor keeps the current more or less constant despite variations in the forward voltage.

2. How to find current and voltage requirements of an LED lamp / strip using a multimeter?

Attach the LED lamp to a power supply and ramp up the voltage until it is acceptable bright. Record the voltage and current. That is your new rating.You can not tell the actual rating with knowing the ratings of the parts inside and how they are connected. The packaging can even influence the rating if it can not keep the parts cool.

3. how can I make a regulator of some sort to protect my led lamp from burning out?

There are ways to convert 12 volts DC to 6 volts DC, but the right thing to do for this sort of project is either to get a light that is natively 12 volts, or a battery that is natively 6 volts. Google "12 volt LED light" and you will see many

4. LED lamp - connecting LEDs in parallel

There are plenty of LED lamps that do not have current limiting resistors and rely on the LEDs being equal. This often is not a problem or not seen as a problem.The LEDs might be "equal enough" for the current to divide itself properly. Maybe the current is not exactly divided equally but as long as the difference in the current through the LEDs is not too small or too large, the difference in currents is not a problem.The LEDs themselves have some series resistance.With many LEDs in series, differences in forward voltage will "average out" reducing the difference between LED strings.Is putting a series current limiting resistor for every string and using CV source a more robust solution and why not do it in this way?Indeed this would be a more robust solution to add current limiting resistors.The reasons why this is not always done might be cost (a resistor cost money and might take up valuable space where there could be an LED). Also: it works without resistors so why add them?

5. Does LED lamp gives protection to our environment?

No. Even a perfect lamp that produced only light does not "protect" the environment. All it does is damage it less than any other type of light does. It still uses power, which means you need a power plant, which produces pollution and greenhouse gases. .

6. LED and lamp in series - why does the bulb not light?

The LED drops so much voltage that there is very little left for the light bulb.You have only two 1.5V batteries, which, in series, are barely enough for the LED forward voltage.Incandescent bulbs quickly go dim when the power which they dissipate is reduced: power is voltage squared, divided by resistance. For this very reason, dimming incandescent bulbs does not save much energy. Only a small fractional decrease in the dissipated wattage dims a light bulb almost all the way.Filaments generate mostly heat, and only a small fraction as visible light. This is very sensitive to temperature, which is very sensitive to dissipated power.Try looking at the lamp in a dark room; you may be able to see a faint red glow. Also, the light from the LED may be preventing you from seeing whatever dim glow the bulb is putting out, even in a dark room. Cover the LED, too.

7. how to install a led lamp inside mouth?

A miniature LED, if connected with a tiny 1.5 volt button cell,properly, u can keep it well into ur mouth.but with uneasiness

8. LED lamp increased power consumption after installation: Why? [closed]

With the limited information provided, this is a guess, and a suggestion for clarification, but... Where did you get consumption of 2W per lightbulb from? Those are simple LED's, no special drivers or current limiters included in the package. If you have them in a series string, you need to limit the MAXIMUM forward current for the entire string to 150mA (from the datasheet as absolute max If). You can not do this just with a voltage source, and for a series string, I would not attempt it with a single resistor either, use a current regulator.If you have them in parallel, you can use a series resistor with each individual LED, based on your supplied voltage, to limit its current.The wild guess/speculation part is here... I am thinking that without proper current control to the LED's, you are burning them out, and they are failing as short circuits causing more current to flow as the voltage drop across failed ones vanishe.