The power draw per foot or meter is almost always listed in an led strip s datasheet.
5 meter led strip wattage.
The led strip lists the total wattage as 24 watts or 4 8 watts per meter.
Power 4 watts per ft x 5 ft 20 watts.
Example scenario connecting 5 ft of led strip where led strip power consumption is 4 watts per foot.
This calculation is important for determining the size of the power supply needed.
Step 4 calculate the estimated power usage.
However it is recommended that you make allowances for unintentional overloads.
Aloysius defenestrate mar 22 15 at 15 05.
12 volt at 5 amps 60 watts 300 rgb leds.
The led strip has a power consumption of 14w m.
Not sure if you should choose between 12v and 24v.
I assumed 300 leds in a 5m strip and picked the higher of the draws between rgb and white.
3014 5630 and so on.
So you need a led power supply sometimes referred to as a led driver that can deliver at least 119 watts.
All else equal 24v is typically your best bet.
I use one of these ebay item 201217255753.
This checks out because there are 5 meters per reel and 4 8 watts meter 5 meters 24 watts.
Conventional 3528 smd power is 0 08w 2835 smd the power is 0 1w or 0 2w and other smd models are.
Our 5ft length example setup will use 5 12w ft x 5ft 26 5 watts.
14 x 8 5 119 watts in total.
Although it s not listed here we can calculate the amperage using the formula p v x a where p is the wattage v is voltage and a is amperage.