Oscillator Powering 6 Modified Led bulbs

[magnetman12003]

Hi magnetman, I'm not aware of the 7 watt, 12 volt led bulbs lux at 10 feet and i see the issue with your lux meter.
That is why i suggest the white foam board method, at least for me, all i'm concerned about at the moment, is usable light for humans eyes to use, so placing the white board at whatever distance, we can compare to known grid powered or battery powered led bulbs.
The 12 volt led bulbs you have, a man said in a video, they are around 600 lumens, directly powered from 12 volts dc.
Here is a new drawing of my latest circuit setup.
peace love light

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[magnetman12003]

Hi all, was posting about this particular oscillator light in another thread, felt it was good enough for its own thread.
It's the basic joule thief style circuit, using gutted 12 volt led bulbs rated at 7 watts from ebay.
The bulbs did contain a boost circuit inside them, to boost from 12 volts to around 21-24 volts dc, of course i removed that circuit from each bulb, for added efficiency.
The setup really is putting out a very good amount of light.
I was previously using a small number of turns on the ferrite c-core, then used many more coil layers and increased efficiency even further.
When looking at a Phillips 40 watt equivalent led bulb in a nearby can light, it is not much brighter than one of the 6000k pure white led bulbs.
Here is a drawing and some pics.
peace love light

Hi SkyWatcher123,
When you measured the 11.79 volts at 330 milliamps was that measurement taken at the 12 volt power source or was it taken off the base of one of the bulbs in series?   This is with all bulbs lit.

What was the voltage and current with a straight shot to the bulbs from the 12 volt power source WITHOUT this  setup?

[SkyWatcher123]

Hi magnetman, that was taken at the input, right at start of circuit.
12 volts will not drive the bulbs with the inside boost circuitry removed, but if i did make that test, it would definitely be well over 1 amp input.
peace love light

[magnetman12003]

Hi,SkyWatcher 123,

I noticed that when I connected my 9 seven watt,12 volt bulbs directly to my setup and powered them off a 12 volt,12 amp hour battery they were blazing white in color and my room looked like heaven with so much light.
So this got me thinking about replacing that battery with a AC to 12volt DC power source.
I found that a 100 watt 12 volt AC to 12 volt DC power source was inexpensive so I bought one.

https://www.amazon.com/Switching-Power-Supply-Regulated-Transformer/dp/B008AG4SPO/ref=sr_1_17?s=electronics&ie=UTF8&qid=1493754094&sr=1-17&keywords=12+volt+100+watt+power+supply

Now I will have a powerful standard to compare brightness as well as determining the actual advantage of any jewel thief circuit or Bedini based circuit I build.  Awaiting the power supply now.

[SkyWatcher123]

Hi magnetman, looks good, i have the 12 volt computer power supply that is good for 300 watts.
I tweaked the circuit some and raised the output wattage to 4.6 watts at 34 volts input.
At the moment, i have little doubt, that each of these 120 volt - 40 watt equivalent, modified led bulbs, are outputting at least 300 lumens or more each.
So what do we have then, 1200 lumens with a 4.6 watt input.
That works out to, 260 lumens per watt.
Each bulb is normally rated at 5.5 watts input - 450 lumens and 22 watts for the 4 bulbs.
Based on the wattage input to circuit, that is 21 percent of that 22 watts.
So normally, all 4 bulbs would output 1800 lumens.
And 21 percent of 1800 lumens, is only 378 lumens.
There is far more lighting in this room than only 378 lumens, is it as bright as heaven, no, but it is very bright up here.
I have made previous experiments with the 120 volt led bulbs, using oscillators like this, so i know what is possible.
This kind of efficiency is quite normal for these setups, though this particular one i've built, is doing better than most i have made.
Previously, i used a solar panel as a light meter to compare grid powered led bulbs to my oscillator powered led bubs, this is how i know what these circuits can do with led bulbs.
Really though, what matters is, is the light useful to our human eyes to light up rooms.
I'm thinking about an oscillator that will power these 12 volt, modified bulbs i have, efficiently.
What is needed i think, is something to maintain the high voltage spikes of the primary oscillator and maybe use a secondary coil to step down those spikes to a lower voltage and higher current, since that is what these prefer, since the led board is rated at around 22 volts.
Though we don't want to kill off the spikes too much, so as to maintain an impedance match of sorts, because that is where we get the extra efficiency.
peace love light