I am not an electrician so I can't give you the exact reason why it saves money, but here is why I use them. I was working with some industrial electricians a few years back, I always saw the 240 lights and thought what the hell are those for but I learned real quickly in my 18 years of growing in FL you don't say shit to anybody about anything ever so when going to the grow store I never asked word one. Well when we were getting ready to get all our supplies for our setup, they saw the 240 and said get those and I was like what for? And they explained all this stuff I didn't quite understand but in the end said it would save us money.
Well all I knew was it wasn't going to cost us any more money so I thought what the hell. Long story short, as I said I had quite a few years worth of time to compare it to, when we set up we went with double the number of lights and I didn't notice much of a difference in the electric bills I was used to. They completly upgraded the electric service specific to do what we wanted. And from there on out I have never used another 120v again and I am far from using 1 so my bill has always been quite a bit. But not near what the chart says it is supposed to cost me for the number
abell, why is it that there are so many uninformed souls on this site spreading complete bullshit.... you are billed for your service in kwh, agreed, what you obviously don't understand is ohm's law...
this means that if you switch to 240v from 120v you do actually cut your amp draw in half, but, by doubling your voltage the watts, which we are billed in stays the same... I (current) x E (voltage) = P (watts)
not to get too complicated but:
120v x ?amps=400w.... amps = 3.33
240v x ?amps=400w.... amps = 2
i think you don't understand, a 400w lite is a 400w lite, is a 400w lite, it still consumes 400w no matter which voltage is connected... simply draws less amps which could possibly lead to a very very very little gain in effeciency, less that 1% for sure...
I will grant you that thinner wire can be used to run to the lighting which can save you a little money during setup, and possibly minimal loss is avoided by going with 240 as compared to 120...
you said earlier in the post that you can run 2x 1000w on 240v for the same price as 1x 1000w on 120, this is completely impossible, it is obvious you don't understand electricity...
don't try to get on this site and spew falsehoods, i realize you don't understand, but please for the sake of newbies and others that are "in the dark" about electricity don't act like you know what you're talking about, b/c to someone that understands electricity it is perfectly obvious you have no fkn idea...
really not trying to be a big dik in this post, just don't understand why people try to act like experts in areas they know nothing about, lets all pitch in where we know the topic, leave what we don't know for those who do...