Hi,
I’m planning to build some kind of lantern.
For that I need an omnidirectional LED emitter that will run on a battery (preferably 1 cell lithium).
So roughly somthing like that shapewise: http://www.gearbest.com/led-light-bulbs/pp_218047.html
But all I can find are emitters for 110/230V.
Any idea where I could have a look? Or what search words I should try?
I’ve never seen an omni-directional low-voltage corn light like that. Only ones that are built for 12V automotive use. And those are typically just series/parallel connected from what I’ve seen.
You’d need an emitter arrangement something like this as individual LED’s have narrower beams; none are 360 degrees sideways. These are generally known as “cob” or “corn cob” bulbs from their shape. Size it and choose your emitters to suit your power source with heat-sinking in mind. Some have used a single centered emitter aimed onto a reflective cone but centering the beam is critical and there seems to be a lot of loss in those reflectors though it might work well enough for your needs.