Question 1

How to calculate the power consumption of LED?

Accepted Answer

To calculate the power consumption of an LED, you need to know the LED's voltage (in volts) and current (in amperes). The power is calculated by multiplying the voltage and current, and the result is the power consumption of the LED in watts. Taking the example of a Lumileds 3030 LED chip, which typically has a voltage of 5.8V and a rated current of 120 milliamperes, the power consumption would be 0.696 watts.

Question 2

Which one is more dangerous, high voltage or high current?

Accepted Answer

For knowing this, let's take an example of an electric shock:

The human body can be considered as a resistor, and current (whether high or low) requires a potential difference to flow through it.

The typical value of potential difference that our body can tolerate is around 50-60 volts. So, electric shocks occur due to the potential difference rather than the magnitude of the current. While larger currents can have more severe effects, if the potential difference is not greater than 60 volts, the impact is not significant. You might wonder about electric fly swatters that have voltages in the thousands, would they cause electric shocks? The answer is no because the electric fly swatter generates a high voltage for a very short duration, and once it comes in contact with the human body (which has a high internal resistance), the voltage immediately drops, resulting in a low current that does not cause an electric shock.

Question 3

Do LED lamp beads use AC or DC?

Accepted Answer

LED stands for Light Emitting Diode, which is a semiconductor device, like a transistor or other type of diode, that lights up when the polarity is the same, and turns off when the polarity is the same, which means they can only work with DC voltage, while unlike incandescent light bulbs or other household appliances that cannot be plugged directly into AC power to work.

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LED Street Light

Solar Street Light

Led Flood Light

Solar Flood Light

LED High Bay Light

High Mast Light

LED Traffic Light

LED Tunnel Light

LED Garden Light

LED Canopy Light

Led Bollard Light

Lighting Accessories

Smart Systems

Simulation Design

Smart Financing