## Can LED withstand 5V?

No, you cannot safely power an LED with 5V without a resistor. The resistor is absolutely 100% required. The resistor isn’t put there purely on a whim, it’s required to set the current based on the supply voltage minus the LED forward voltage and the resistance of the resistor.

## Can you power 5V LEDs with 12V?

You can add a resistor to the existing indicator to make it 12V. Since there is 7V difference between the two set points (5V indicator, 12V supply) and a known current you can calculate it as follows.

How many LEDs can connect to 5V power?

This is called kirchhoff’s voltage Law. So if you have a 5v power supply and each of your LEDs have a forward voltage drop of 2.4V then you can’t power more than two at a time.

### What is 5.5 watt LED equivalent?

LED light bulbs take energy efficiency to another level, using around 40% less energy than CFL equivalents….LED equivalents to CFL light bulbs.

CFL Light Bulb Wattage LED Equivalent Wattage
9 Watt 5.5 Watt
5 Watt 3 Watt

### What resistor do I need for 5V LED?

Basics: Picking Resistors for LEDs

Power Supply Voltage LED Color Resistor (calculated)
4.5 V Blue, Green, White, or UV 48 Ω
5 V Blue, Green, White, or UV 68 Ω
5 V Red, Yellow, or Yellow-Green 128 Ω
5 V Red, Yellow, or Yellow-Green 56 Ω

What is the max voltage for a LED?

LED V/I characteristics

Characteristics Unit Maximum
Forward voltage (@350mA, 85°C) V 3.48

## Are 12V LED brighter than 5V?

…it seems 12V strips are not brighter, but they need less current, and the voltage drop does not affect the colors that much. Correct. Although the voltage drop/colours can be mitigated by using extra, good quality power wires to both ends & middle points to reduce the voltage drop in a 5V strip.

## Will an LED work on low voltage?

Low-voltage systems work with all kinds of light bulbs including incandescent, fluorescent tubes, compact fluorescent, halogen and LEDs.

What happens if you use an LED without a resistor?

When hooking up an LED, you are always supposed to use a current-limiting resistor to protect the LED from the full voltage. If you hook the LED up directly to the 5 volts without a resistor, the LED will be over-driven, it will be very bright for a while, and then it will burn out. That’s what they say.