Oscillator Powering 6 Modified Led bulbs

[lancaIV]

https://en.wikipedia.org/wiki/Foot-candle
quote: "Thus one foot-candle is equal to one lumen per square foot or approximately 10.764 lux"

Okay,thanks a lot .

Sincerely
              OCWL

[magnetman12003]

I am going to try lighting 9 seven watt 12 volt bulbs with 36 volts then try three  115 volt 10 watt bulbs in parallel.  I just bought that 900 watt booster converter.  Then I will modify the bulbs and work it that way.

In all cases I now have standard illumination figures to go with using my candle power meter.
So now I can compare a bulb illumination to a standard and adjust the setups output till I have the same candle power reading.  Then compare both results as far as what voltage, current. and watt values have been established.

I got my boost converter and set it to 36 volts,1 amp.  When I powered it up to 3 twelve volt bulbs in series the module electronic package inside each bulb burned out. Before the modules burned out the light output was the highest I had ever seen.  What safe dc booster voltage will the bulb leds operate with the burned out module removed and a direct connection made?   Looking at all this however I now can see a much lower watt figure to operate the bulbs using a DC boost converter.

[SkyWatcher123]

Hi magnetman, sorry you fried the drive circuits on your bulbs.
It's probably because the drive circuit has a full wave bridge going into the circuit and this means you were not actually placing them in series.
It was probably the same as placing them in parallel, minus diode voltage drops, so then each circuit was getting 36 volts.
The forward voltage for the led board on my 12 volt led bulbs, is around 20 to 24 volts.
Best to start low and have amp meter connected to input of boost converter, until you get to the 7 watt input or a little higher, taking efficiency loss into consideration.
Then you can check the output voltage of boost converter and see the max voltage of each led board.
peace love light

[magnetman12003]

I have taken the burned out module out of ""ONE"" 12 volt 7 watt LED bulb and ran wires straight from the bulb base to the bulb - + bulb light plate. In this configuration what safe booster converter voltage would you recommend as a starter with no split positive battery charging involved for one modified bulb?

[SkyWatcher123]

Hi magnetman, the boost converter will not allow you to go below the input voltage, so start from there and raise output voltage while having an amp meter on the input of boost converter.
Then adjust output voltage so you get around 7 watts input, or whatever the wattage of your led bulb is and the voltage at the output of your boost converter, under load, is your max. led board voltage.
peace love light