speciel LED lights?

[pr0letar]

Hi
So new to forum thanks
i am buying this one. cus i need it for a chair.
http://www.ebay.co.uk/itm/60pcs-5050-SM ... 5d5964b6a0

specs here

Code: Select all

Type: Module 3 LED 5050 SMD

color: Cool White/Warm white/Red/Blue/Green/Yellow
LED quantity: 3PCS
Beam angle: 120 °
Light Source Life: 50.000H
Working voltage: DC12V
Power: 0.72W

Protection class:IP68
Adhesive fixed: double-sided adhesive
Shell color: Cool White,Warm White,Red,Blue,Yellow,Green
Size: (about)75 * 11 * 5mm
Standard cascade: 20pcs
Shell material: PVC plastic material

Chip: Japan Imports

So i would jusat like to know if anyone can tell me how many hours it can run on a 12v battery.
also is it the all 20pcs thats 0.72W or only one of the LED's ?
I would be doing a homemade battery from 8xAA batterys unless someone else got a better solution
i would like if anyone could calculate the hours of running time on the blue or green color of the led light
Also just to clarify that the 5050 model is waterproof?

Thanks alot

[geeyou]

Welcome pr0letar!

Judging by the dimension I would say it is 0.72W per strip - each strip has 3 LEDs.
Every 3-LED strip can be cut without damaging the rest so I'd imagine this is sold as 3 x 20 strips attached together.

The whole cascade (20 strips) will be about 14.4W, and with Alkaline batteries (~2800mAh) i believe it'll run for just over 2 hours before you need to change the batteries

And yup, these are rated IP68 thus waterproof

[pr0letar]

Thx great info.
Is there any else ideas for better battery time? Car battery is quite expensive. But is also loads of hours? Or how manmany hours on each AH in car battery?

[geeyou]

Not much of an expert on batteries But I believe you're never suppose to discharge a car battery past 50% or it'll shorten its life
The running hours will depend on the capacity of the battery - I think typically they're around 45Amp-hours. With 20 strips it'll last about 19 hours before you need to recharge it. But you'll need to invest in battery chargers etc.

Alternatively I think 8 x Alkaline D batteries (typically ~12,000mAh) will last about 10 hours, although these can get a bit expensive too hehe

[pr0letar]

I got 8 d batteries at home.
Just conect em. I dno how many mah they are on

[Token]

Test it out.

See how long they run.

[pr0letar]

Well then i have to buy new ones after.
Aint cheap

[Token]

Sorry, assumed rechargeable batteries.

[pr0letar]

Sorry they aint.
But what else is good for 10-15 hours uptime?

[TechnoShaman]

Car batteries range anywhere from 50-70 Ah all the way up to the larger ones which have anywhere from 140 - 200+ Ah each. I have a costume that uses anywhere from 1-3 amps depending on the controller patterns I'm running on it. I use lithium poly rechargeable batteries that I charge from a battery bank I keep in my tent (which is charged by solar panels and a generator). The batteries I use are 5.0Ah or 5000mAh. I use two at once and have a Y-connector so they're in parallel giving me 10Ah. That allows me to go for about 4-10 hours depending on how intense the lighting patterns are.