Those auctions state that the power requirements for the LED strips are 0.4A (Amps) per meter, or 2A (5 x 0.4A)for the 5 meter run.

The included adapter is rated at 2A, so would only be able to power 1 x 5 meter run, according to the specifications on the auction.

Having 3 x 5 meter runs would consume 6A (3 x 2A) so I suggest that a 2A power supply would not work and would potentially be dangerous to try using.

Perhaps you should message the vendor of these strips for more information about power supplies. I note they have a 6A power supply that might be good for multiple LED runs:

http://www.ebay.com.au/itm/AC-DC-12V-6A-Power-Supply-Charger-Adaptor-AU-Plug-LED-Strip-Light-/261079380209?pt=AU_Car_Parts_Accessories&hash=item3cc98b30f1#ht_5174wt_906

My pleasure! You're right - Some LED's don't use much power individually ("Luxeon" types aside - that can consume over 1A each!). But 300 of them per run increase their power usage considerably!

I would make sure with the LED vendor about the suitability of the power supplies for your requirements. I would also advise you to check that any power supplies that you do get don't get too hot in use. Please make sure your supplies don't overheat, because some of these power supplies don't have safety circuitry built into them and can melt or catch fire!

Normally, there should be a bit of "headroom" between the maximum power output rating of the power supply and the demands of the connected equipment. For example, a 6 amp supply might easily run 2 x 5 meter strips using 4A, but might struggle to power 3 runs that require the full 6A output of the supply. In this case you may be getting to close to the maximum power usage for comfort and could run into problems, especially if you left the LED's on for extended periods.

Good luck in building your lightshow - you may need some sunglasses too! Be careful, whatever you do.

Simpistically speaking, Power (Watts) = Volts * Amps. In the case of that PSU, then 72 = 12 * 6.

Where was the 120W figure from? Is it from the 48W/5M figure on the original link to the LED strips?

If that is the case, then (using Power = Volts * Amps) 48 = ? * 2, so the ? would be 24 Volts (48/2) to give the maximum power rating of 48W. I would imagine these strips can also be run at 12V too, to give an expected output rating of 24W. (But I don't know this for sure!)

I notice the voltage requirement is not given in the original link, but the link you just supplied seems to suggest that you can run some of these strips and controllers on all sorts of voltages (5 Volts, 12 Volts, 18 Volts and 24 Volts), to give various output power ratings:

[quote="Some Guy on eBay"]

"7)Can be cut by 3 SMD LED (DC 12V) and 6 SMD LED (DC 24V) and connect again by our accessories; "

and

"11.Output power: 5 V: <30W, 12V: <72W, 24V: <144W"

and

"2.Supply voltage: DC5V, 12V, 18V, 24V (for orders specify voltage)"

[/quote]

So the final output power depends on the voltage and the current.

I hope that helps, rather than confuses. I guess the vendors here are showing the maximum ratings. But in your last link, I have no idea where the "360W" figure in the title comes from, since the power supply for sale in the system is 12V and rated at 48W (12V * 4A). There can be language problems when dealing with HK and China vendors direct on eBay, so you should take their specifications with a pinch of salt.

Also, don't be scared of asking eBay vendors questions about the gear they're selling. Make sure you get answers that you can be sure of, else don't buy from them!

With those power supplies, the voltage is fixed (relatively) at 12V. But the current thay can produce will vary according to the load you place on them, so 1 strip would use 2A at 12V and the PSU would supply 24 Watts. 2 strips would use 4A at 12V and the PSU would supply 48 Watts. 3 strips - 72 Watts - the maximum power the supply is capable of at 12V.

If you run your strips at 12V, then those power supplies should do nicely - aside from my point about overloading the PSUs and asking them to supply more power than they can handle, as opposed to having some power "headroom" and more, but cooler-running power supplies.

Sorry for all the maths/electronics lessons! I got to see some pics when you get this all wired up!

Well, I'm a bit OCD too and here's the problem:

The light strips in your first link say they are rated at 48 Watts and draw 2 Amps in 5 meters, OK? I can't find any information on voltage in that auction.

If they were to draw 48 Watts and use 2 Amps, then you'd need 24 Volts to do this. Your other link is for a 12V power supply.

I think that the LED strip might work with a 12V supply, seeing as all the other links you provided seem to do this. If that is so, their power output would not be 48 Watts, but 24 Watts instead. That is not the only snag I see with pairing up those LED's with that adapter.

I also note that the depicted 4 wire and 4 pin connector on the LED strip does not look like it would fit the 2.1mm DC plug pictured in the power supply.

I wonder if you would need one of these things between the power supply and the LED strip:

http://www.ebay.com.au/itm/NEW-44-Key-6A-IR-Remote-Controller-Wireless-RGB-3528-5050-LED-Strips-DC-12V-/251125525206?pt=AU_Lighting_Fans&hash=item3a783f6ad6#ht_2029wt_906

I'm assuming that these LED strips might need to plug into a controller or something. There is not enough information in that auction listing for me to make a judgement about the two items working perfectly together straight out of the box without this extra controller box (which does have a 4 pin socket and a DC power socket as well).

I still think you might need a controller. The power supplies will have 2 wires, terminating in a "DC" type plug. It looks like the LED strips have some sort of 4 pin connector terminating their 4 wires. The controllers (like the one I linked to) have both a DC socket (for power) and 4 pin sockets (for LED strips) on them.

I'm not sure about simply cutting the LED strips down. That might create short circuits.

You know if you're overloading the adapter if you ask it to provide more power than it can deliver, so you need to know what you're planning on plugging into it.

How do you plan to connect the strips with their 4 pin plugs to the power suppy, with its DC type plug? Perhaps you should be asking these questions to an LED light system vendor.

[QUOTE="MegaMatt91"]

He is asian and cant really understand me haha. Ok so the controller you are talking about is ;

http://www.ebay.com.au/itm/NEW-44-Key-6A-IR-Remote-Controller-Wireless-RGB-3528-5050-LED-Strips-DC-12V-/251125525206?pt=AU_Lighting_Fans&hash=item3a783f6ad6#ht_1951wt_906

So I can use this, and the new power adapter to hook up 10M of LED strip, and keep the ones in my room how they are? So they will both run seperately - I will have 1x 10M LED strip, and 1x 5M LED strip

The 10M LED Strip will use 12v 6A power adapter with new remote / IR

The 5M LED strip will use 12v 2A power adapter with old remote / IR

?

I will buy that new remote just to try out the other settings it can do haha.

[/QUOTE]

That sounds like it might work out. The controller says it has 3 channels, although not all the wire connectors are shown in the pictures. At least the LED strips and power pack would all have the right sort of sockets on them, so plugging it all together would be "easy" and the power requirements would be well met. These 3 bits (LED, Controller, & PSU) also mirror the kit you already chose.

If you look here and scroll down to the pictures:

http://www.ebay.com.au/itm/5M-3528-SMD-Warm-White-300-LED-Strip-Light-12V-DC-Decor-Show-Party-AU-Seller-/261079349991?pt=AU_Car_Parts_Accessories&hash=item3cc98abae7#ht_5686wt_994

You will see a terminal block that connects the wires from an LED strip, via screw terminals, to a DC type socket and striaght into a power supply without a controller. However there are only 2 wires coming from the LED strip in that product (not like the 4 wire system you linked to). It does show the possibility to directly connect some LED strips to a power supply without using a controller.

I'd hate you to get something you don't need or can't use, so wouldn't be able to confirm anything will work without further questioning of the trader involved. Just ask them will this LED strip work with this controller and this power supply.

I'm sure you'll see the light soon!

[QUOTE="MegaMatt91"]Oh another question, say when I get them all 3 work fine from the new power adapter I got does that mean all is good? If the power adapter can power them fine does that mean they are okay to stay like that?[/QUOTE]

Maybe so. I'd check to make sure the PSU doesn't get too hot to touch. But in theory, you may be able to connect the 3 LED strips to one controller (3 channel) and power it from a single 6A PSU. Remember that you'd be running your power supply at it's maximum output, so might be venturing into danger-territory. IT may also be worth monitoring the controller and making sure it does not start melting too!