I purchased a power supply online for a led light. But before I go plugging it into a LED light I just want to be sure it will work. It will be plugged into two led strips for a total of 8 watts.

Old one


New one

 

Welcome to AAC!

At first glance, the substitution seems okay.

To know for certain, you need to measure the output of both to see if they're actually 12V. If they aren't, you need to find out if your light would be sensitive to the difference.

 

So "yes" according to the specs in the pics? And to testing the output. Wouldn't that be going above and beyond by measuring it?

Thank you for your responses.

 

Wouldn't that be going above and beyond by measuring it?

Not if you don't want to risk the light. All power adapters aren't alike. Some give a higher voltage at lower currents, some don't. Some are regulated, and some aren't.

It's cheap insurance to measure to be certain.

 

12V 2A, or 12V 3A.

 

12V 2A, or 12V 3A.

What exactly does that mean?

 

And i bet the current is

Not if you don't want to risk the light. All power adapters aren't alike. Some give a higher voltage at lower currents, some don't. Some are regulated, and some aren't.

It's cheap insurance to measure to be certain.

Especially cheap chinese ones with fake amp (current)

 

Hello,

Especially cheap chinese ones with fake amp (current)

Both power supplies are made in china.

As far as I see the polarities are the same.
The new one can deliver 3 A, wich should work fine.

Bertus

 

Most of the linear non-regulated DC wall warts have a higher terminal voltage at a lighter load current. So exactly like has been said already, you need to measure the voltage provided by the device you want to use. OR, you can add a variable high power resistor in series with the LED light, and adjust the resistance value until the voltage at the light is correct.

 

They both appear to be SMPS as they take AC input from 100vac to 240vac, linear are usually limited to one fixed voltage.
Max.