question about an hps ballast

[nickers]

I just bought a 400 watt hps ballast that does 120/240 volt ...can I run it on 120 to power a 400 hps bulb....I just ordered it today so I dont have it till Thursday

 

[vostok]

YES! ...120/240 volt does imply duel voltages

 

[nickers]

Ok...is there a difference in light from 120 to 240?

 

[vostok]

No not at all, the input voltage 120v or the 240 is boosted in the ballast to meet the requirements for the bulb selected

 

[nickers]

Awesome ...cheaper electric bill....and my second tent will be complete

 

[Red1966]

Ok...is there a difference in light from 120 to 240?

You would have to use a different cord. They usually come with the 120 cord and the 240 cord must be bought separately. The light output is the same either way.

 

[Red1966]

Awesome ...cheaper electric bill....and my second tent will be complete

The 240 may or may not be slightly more efficient. Any savings on the electric bill will be very small.

 

[vostok]

There is a very useful vid on you tube comparing different hps bulbs,

ps I thought ALL lights shipped for the 240v cables ...?

 

[cat of curiosity]

half the voltage, twice the amperage, same amount of watts. 240v would allow you to run more on a circuit.

i use raw ballasts; i don't like to pay an extra hundred bucks for a fancy metal box...