Exploring 12V and 220V LED Strip Light Differences

The led strips with 12V are low voltage, and 220V is a high voltage electric current for civilian use. It could also be said that the input voltage is 220V, and the voltage of operation is 12V.

The light strip 220V is practical and can be directly connected to the power supply of 220V however it isn’t risk-free.

The low-voltage 12v led strip lights are more secure. When connecting, it is necessary to connect a converter first before the power supply can be connected.

The 220V plug used for lights has an internal converter with a rectifier with constant current output. Its rectified and amplified output voltage is 300V DC.

It regulates the output current by constant current conversion to tens milliamperes DC to drive the LED light strips. The 12V light strip isn’t equipped with a converter, but 12V DC is utilized to power the LED strip.

LED Selection Parameters and 12V Direct Drive Led Strip Lights

First of all, let me ask a question. is it possible to directly power a light-emitting transistor in series with a resistor?

The maximum operating current of LED lamp beads with low power in a variety of colors is usually 20mA. However the actual values vary between 5 and 15mA.

The forward voltage drop for red LEDs usually 1.62V. Green ones are typically 1.82.4V and white or blue are 33.3V.

Consider that a blue light bead is drive-n by a power supply that is 12V and the operating power is 9mA. Then, the current-limiting resistor R = (12V-3V)/9mA = 1KO. 3V in this formula is the voltage drop that is forward of the blue lamp beads.

Even though I chose an LED, it still caused me issues. Its brightness isn’t as high as the three-color light. However, I only see red.

The 3535MWAP model from Nationstar Optoelectronics was selected.

The forward current is the one that the led strip lights 12v use. The working current of normal diodes emitting light is quite small, only 10mA-45mA.

Light-emitting Diodes (LEDs) are connected in series with resistors to protect them from voltage spikes.


Diets made of different materials can produce different colors.

Even for the same material, different luminescent colors can be created by altering the nature or concentration of impurities or changing the composition of the substance.

The table below shows the different luminescent materials which are utilized in LEDs.

Utilization of Luminous Color Materials Wavelength

Red GaP in the normal range 700

Red GaAsP with high brilliance.

Super bright red GaAlAs 660

AlGaInP Super bright red between 625 and 640

Green in the normal sense GaP

High Brilliance Green AlGaInP 572

Super bright green InGaNg 505-540

GaAsP in ordinary yellow 590-610

Super bright yellow AlGaInP 590-610

IV: light intensity

The light intensity I is the light light that comes from the lightsource in the unit of a solid-angle.

Millicandela is the unit of the intensity of light, which is often called candela.

Candela refers to the luminous intensity of a light source in a given direction. Candela is a measure of the magnitude of light in a particular direction.

VF: forward voltage

Forward voltage is the term used to describe the voltage drop that is generated between the positive and negative electrodes if the forward current running through the LED is a specified value, represented with the symbol VF.

The forward voltage of SMD LEDs that are commonly used by our company is 2.0V-3.5V.

If the voltage is higher than the normal operating voltage The diode might be destroyed. If the forward voltage drops below a certain threshold (also called the threshold value) it is extremely low and there isn’t any light emitted.

When the voltage is above some level, the forward current rapidly increases along with the voltage.

The measured forward voltage drop is only a few hundred volts thus the light emission is incorrect.

View angle: perspective

In the luminous intensity distribution graph the angle created by an intensity equal to half of the intensity that is maximum is known as the half value angle.

As illustrated in Figure 5>.

The direction that has the greatest intensity of light is the optical direction. In the figure the angle between the optical and mechanical Axes is known as the angle of deviation.

The half-value angle directly is affected by the thickness of the chip as well as the size of the mould strip.

Half-value angles of various sizes are possible to obtain by selecting different materials and package sizes according to the requirements of the customer.

There are three types according to the intensity of light angular distribution diagram:

A high degree of directivity, generally with pointed epoxy packaging or reflective cavity packaging, without adding scattering agents.

The half-value angle is 5 deg to 20 deg or less. The high-directivity lighting can be used as a local source of illumination, or with a light sensor, to make an automated detection system.

b Standard type, usually used for an indicator lightwith an half value angle from 20deg to 45deg.

C scattering type is an indicator light with more viewing angles with half-value angles of 45deg-90deg or more.

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