Very very disappointed with my MR-16 Mod... What now???

[Tessaiga]

So, I got a 3D bored Mag, Kiu socket, modamag 3D to 12 AA holder, 12 CBP 1650 cells freshly charged and a 12 V, 50 W Osram MR-16 bulb (10 degree beam)

Assembled everything, turned off all the lights, pressed the switch and expected to see night turn into day, but instead I was washed in a sickly yellow shade of light... :sick2:

WTF???

Isn't the MR-16 supposed to be really bright and white??

So can anyone explain what I did wrong?

If thats all I can expect from a MR-16 mod, then maybe its time to put the spare parts I have to better use. What other mods can I run with the Kiu socket, 3D to 12 AA and the bored 3D? I have an aluminium reflector, so thats not a problem...

As an aside, I bought a spare 12V, 90W Osram bi-pin bulb which I stuck in just to try for fun, it was an even sicker shade of yellow and after about 2 seconds, the light started to dim. Why??

What kind of battery configuration do I need to run this bulb safely and overdrive it to its full potential?? 2 parallel stacks of 4 X 18650 in series??

 

[FredM]

How many volts is the MR-16 getting?

You sure all your 1650's are charged and showing good volts?

 

[barkingmad]

I run a MR16 (50w) off 12 Eneloop AA's - are you sure your cells are ok as the CBP1650's are supposed to support higher drain than Eneloops.

If you have a multimeter would measure the voltage of each one (no load) then put them back in the carrier and measure the voltage of all 12 - guess it would be up around 18v?

Lastly put it under load with the bulb and measure the voltage and current draw - for 50w at 12v it should be around 4a (so many sure you use the 10a setting on your meter).

 

[Tessaiga]

Ok... mybe the charging is wat's giving it problems.. think will hold off this project first till my triton gets here...

12 Nimh would only be 14.4V..

Just curious.. can I run 12 normal AA?? Will 12 X 1.5 = 18V blow the MR-16??

 

[mdocod]

few problems going on here:

1. How many hours is the bulb rated for? a 6000 hour MR-16 will need more like 19+V at the bulb to come "alive." Try a 2000 hour lamp with 12 cells, might be a bit better.. Really a 2000 hour lamp needs about 18V at the bulb to get exciting. With your pack, I doubt you are ever getting better than ~15V to the bulb after resistance losses.

2. Have you done any resistance fixes? I'm not familiar with that battery pack... but if it uses the stock spring to make contact with the base, you should do the spring resistance fix at least, ideally, you should also do the switch fix. This might get you up around 16V at the bulb fresh off the charger, still not enough to be incredible.