Which would be better

MAN, is that 9.7 each. Surely not, that's 1100+ watts. Maybe 4 or 5 of them, but 1. DAMN!!!


They're only a 200-225 watt fixture. That's less than 2 amps each by my math. You smoking that hash again?


Be Cool, CG

 

from their website.


OK 7 amps. sorry didn't notice input/output.


But still 7 amps per light is still a hulluva lot. Looks like I'm wiring this all 220.

 

I think if you'll look closely it's converted to DC. It says " 36 volts DC and 9.7 amps". I'm sure you know that power is in watts and that Watts=volts x amps. When the voltage is reduced, 120 to 36, the amperage is increased to maintain the wattage. I learned that in physics a long time ago.:roffl:


So if the unit is actually 7 amps x 36 volts DC then the total usage is 252 watts. Drawing, like dxe said, around 2 amps at 120 volts from the wall.


Be Cool, CG

 

Correct. And they run their's a little softer around 220-240w. Those power supplies are adjustable too. I know I saw people posting up actual wall draw and want to say it was 1.7 or 1.8 or something like that. I'll see if I can find it.

 

Not that you all need a lesson in electricity, but one of the easiest was to look at it is, it's like a water hose. Whatever goes in one end has to come out somewhere. So look at it as the watts are the amount of water, the volts it the size of the hose, and the amps is the pressure, and the resistance is the little hole in the hose.


If you reduce the size of the hose, voltage, then the pressure, the amps, are increased to maintain the flow, wattage. Then factor in what leaks out of the little hole, resistance, and you've got your output.


That's just one of the ways it was taught to me 40 years ago and it still works today.


Be Cool, CG

 

Yeah, I found the bar stool math was much easier. 1 drink empty = 1 drink ordered. And then the old "a 2 at 10 = a 10 at 2"


Be Cool, CG

 

OK I get it but why does the power supply have 7 amps 120 AC printed right on the skin if it really draws 2 amps?

 

Because that's input load. It can tolerate up to 7 amps at 120V alternating current. Over that and you overload the powersupply and burn up components. It can deliver of that 7A 120V input, 840w max, to three outputs at a maximum of 349W to a single channel or theoretical maximum of 280w on each of the 3 if using all output terminals. Though that's were driver efficiency comes in. An input Max of 840w or whatever will not equate to the same actual output because there is some loss through the driver. Some are better than others and the meanwells have high efficiency and reliability.

 

Huh, maybe the wiring is rated at 7 amps. The higher the rating the less resistance on the flow. Like an outlet can be rated at 20 amps meaning it has the ability to handle up to a 20 amp flow.:bduh:


Can they be chained together? If so the first would have to handle the flow of all the lights combined.


Be Cool, CG

 

They use it to power each lamp. Though unless I'm missing something technically you could run 3 off the one supply. Though I'm not sure what generates more heat a single supply for each or multiple off of one. I know someone I can ask to confirm though.

 

Not to keep hijacking the thread, but years ago a friend and I were out bar hopping and he decided to take off with some woman and said he'd be cool. Next morning he called me up to come get him in a motel parking lot. I asked him how the night went and he said he couldn't remember. But when he woke up with a dry-ass mouth and went to take a drink from a glass of water on the night stand he found her teeth in it.


Needless to say he snuck out and told me to hurry the fuck up.:roffl:


Be Cool, CG

 

OK where do I get a 7 amp circuit? :roffl:


callin BS on this 2 amp claim. the thing draws 7 amps of the 30 from my breaker right?

 

gonna call him tomorrow