I'm using a LED strip that is roughly 910mm. The LED strip is a OEM 12V LED strip, running at 5W per meter.
My project is a LED strip that is suppose to be powered by batteries, this is to be used in a scenario of lighting up products in a supermarket for promotional and seasonal items.
So long story short I need to find out how many batteries or which batteries are the most efficient into powering my 910mm long LED strip for at least if being ambitious 30 days or 14 days or at least 7 days.
The reason behind why we need to use batteries is for the portability of the rig as it's meant to be a temporary solution not a permanent fixed product solution. I've also thought about using LED strips that run at either 6V or 3V to prolong the life expectancy of the power drawn from the batteries, but I'm not sure if this would improve it drastically. Also out of all the batteries would you say using AA, AAA, D, 9V batteries which would be the most efficient to use in this case?
My initial question is how many batteries would I need to power a LED strip roughly 910 mm long to last lets say 30 days or 14 days or at least for 7 days?
If there are any more variables or question you need in order to answer my question please ask.