Posted 28 February 2007 - 08:40 PM
Posted 28 February 2007 - 09:27 PM
Posted 28 February 2007 - 10:35 PM
Posted 28 February 2007 - 10:47 PM
My guess is that an HMI is different as there is no filliment (resistor) meaning perhaps just a ballast thing.
120 has a neutral vs 220 where as the neutral is hot, yes?
that and the power sorce, I have seen the opposite and made a piece of 3/6 208 with an electronic ballast and run a 4K wich is normally 120. (though all of it Italian gear)
I guess my final solution is ballast + bulb + proper power supply = light.
Posted 01 March 2007 - 10:53 AM
Posted 02 March 2007 - 05:52 AM
Here in Singapore we run on 220 volts, i think in the US they run on 110 or 120 volts right. Normally it would state the required voltage. If it says that it runs on 220v and you use 120v, you will have power, but the output of the light will be very week, and i would think the colour will be off too.
I'm pretty sure you can get a step up transformer for such a thing, but it may be very expensive. Your idea of getting a 2k and gelling it might be a safer and more logical option. especially if you're not getting a ballast.
Posted 03 March 2007 - 01:20 PM
the voltage has nothing to do with the bulb right, it has to do with the voltage it take to run the thing.
I'm pretty sure you can get a step up transformer for such a thing, but it may be very expensive.
If you had a 220v ballast and only 115v available, you could run the ballast using a step up transformer.
The voltage of the country (115/230/277/460v,etc.) is irrelevant to the globe. The HMI globe(really an arc lamp) requires a certain voltage to stike its arc and maintain that arc. That is controlled by the ballast. The ballast may be a 115v only or a manual or automatic voltage sensing one, which will run on anything from about 90vac up to over 240vac.
Posted 04 March 2007 - 12:08 AM
A ballast guarantees that whatever spec of voltage the bulb needs it will get--regardless of whatever voltage is going into the input of the supply. In the HMI and fluorescent worlds you can find 120v ballasts, 220v ballasts and then you can find combinations of running from 50 or 60 hz. and then even higher and voltages too. You can also find universal ones that adjust automatically and those are always the best to get if your crossing country lines so you don't have to worry about extra external transformers.
Posted 04 March 2007 - 10:21 PM