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what is the best source for led ribbons?


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fronzizzle 
Copper - Posts: 57
Copper spacespace
Joined: February 21, 2010
Location: Michigan, United States
Posted: June 07, 2014 at 4:11 PM / IP Logged  
Hello all,
I plan on lighting my new speaker box with LED lights, I don't know exactly how much I need yet (in terms of footage) but my current plan is to circle each 10" sub and also do the perimeter of the box, though that may change. Anyway, I usually buy at Oznium but it's expensive and the lengths they offer is limited.
I've found some on other sites, but I get confused. I want to make sure I can get something I can cut to length - actually, multiple lengths - and just run them off a 12v power supply, maybe hook some up to the amp so that the pulse with the base. Not sure if the ones I can find on Ebay and some other sites like Amazon are high quality, if the tape actually sticks, etc. Thanks.
fronzizzle 
Copper - Posts: 57
Copper spacespace
Joined: February 21, 2010
Location: Michigan, United States
Posted: June 07, 2014 at 4:18 PM / IP Logged  
Sorry, another question. If I but a length of the lights, say 15 feet, and then cut them into 4 segements...how do I connect wires to them? I assume I have to solder wires to them or something, just wondering if its anything special I need to use. Thanks again.
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: June 07, 2014 at 8:12 PM / IP Logged  
Cutting is usually done every 3 LEDs and ribbons are marked where that can be done.
Despite my decades of soldering, I recommend the pre-wired joiners for that ribbon type (width). IMO they are more secure and MUCH easier to fit than soldering.
I've bought various ribbons; probably all from eBay. Some were from local suppliers for up to $10 for a 5m roll (Sydney Australia; postage included) and others from China. None were more than AUD$20 per 5m roll for 3528 & 5050 LEDs; 300 & 600 per meter. (Edge lit 335s weren't then available in 5m rolls and were still quite expensive.)
Most have been white but others amber or red (especially the edgelit 335s).
All have been sealed/waterproof types.
Quality-wise I have had no issues but brightness might be the biggest issue. Not that I have compared their specs to actual, but I noted how my (then $12) Jaycar $10 two LED 31mm 12V Festoon Globe is brighter than some cheaper $2 - $3 four LED 31mm festoons that consume twice the current.
Sticky-wise I'm not aware of unsticking in my car lights.
I have a 1m strip of 5050 whites under a melamine kitchen shelf. The plug end has had a bit of assisting tape since day one but recently - after perhaps 6 months of use - the other end has let go, but I'm still merely pushing it back in place. One day I might glue it in place.
But I don't consider the sticky to be poor quality. It may not be "3M quality", but the strip gets quite warm; it is hanging vertically; it's a melamine surface, and sometimes has been lit for well over 24 hours.
My only warning - if it's a 12V strip it means 12V (ie, maybe up to 12.5V) - not automotive 12V.
My prototype license plate raw 12V strip burnt out relatively quickly. Interestingly is was both LEDs and their resistors that failed (ie, until whichever opened first) which IMO shows how close to max tolerance these ribbons are designed. (Maybe non-waterproof ribbons would have survived.)
Note however that 14.4V versus 12V means 44% more power in a resistor, and at least 20% more power in a LED.
fronzizzle 
Copper - Posts: 57
Copper spacespace
Joined: February 21, 2010
Location: Michigan, United States
Posted: June 07, 2014 at 9:41 PM / IP Logged  
The connectors you were talking about - were they like these?
http://www.amazon.com/LEDJump-Connector-Conductor-Ribbon-4-Pack/dp/B005I4J752
On found some ribbons on superbrigheleds.com. The lights I found say they are good up to 14.8v and are acceptable for vehicle use.
Do I need to use weatherproof/waterproof? If water gets onto my sub box, I'm going to have bigger issues to worry about...
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: June 07, 2014 at 10:04 PM / IP Logged  
Mine are usually 2 pin as below. Typically 50c each in packs of 10 or more.
As you say, waterproofing is probably irrelevant.
what is the best source for led ribbons? -- posted image.
what is the best source for led ribbons? -- posted image.
fronzizzle 
Copper - Posts: 57
Copper spacespace
Joined: February 21, 2010
Location: Michigan, United States
Posted: June 08, 2014 at 9:51 AM / IP Logged  
Oldspark, thanks for the response again.
Two more quick questions and then I think I'm good:
1) I found very similar connectors to the ones you pictured on Amazon. They say they are 12V and 10 mm wide. Is this like the lights themselves, do I need to be concerned that an automotive application is higher than 12 volts? Do I need to find connectors that are rated higher?
2) The ribbon I'm looking at says it's 10.15 mm wide; I assume the 0.15 mm extra is okay for these connectors?
Thanks again for the advice.
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: June 08, 2014 at 5:42 PM / IP Logged  
You MUST get the connector that suits your ribbon - hence width, track spacing, and number of conductors (2 for dumb & single color ribbons).
I think they vary with LED type - eg 3528, 5050, 5050-RGB etc - but I'm not certain.
I suspect the "12V" is merely a description rather than a rating. They probably handle at least 30V.

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