890 Lumin LED? Question

[MoonDragn]

NOOO, Dang how many time do I have to say it! Flashlight manufacturers do not use a watt to indicate an output!

They simply can't multiply and use creative rounding to market their LEDs. See here's the same dang LED sold as a 20W LED: http://www.dealextreme.com/details.dx/sku.5848 It's some cheap Chinese LED that they label creatively to sell.

You can't keep claiming a watt as an output either. Claiming a watt as an output would make efficiency a watt per watt... which is a unitless number! WTH!

EDIT: Do you also realize if what you stated were true that they are claiming 15W as an output and the math tells us 12W as the input... that LED would be outputting more than it was getting in defying physics!

How can that be the same LED? The previous LED had a forward voltage of 12Vs. This one is 18-20v. Do you realize you are accusing the Chinese people on not being able to multiply?

That particular LED says it has a Power consumption of 20W which isn't what the first one said.

[xwingband]

How can that be the same LED? The previous LED had a forward voltage of 12Vs. This one is 18-20v. Do you realize you are accusing the Chinese people on not being able to multiply?

That particular LED says it has a Power consumption of 20W which isn't what the first one said.

They look identical and dealextreme deals with chinese electronics just like that one. Doesn't really matter.

You didn't answer what I said before though. 15W CAN NOT be an output as the input is 12W. So your comment was wrong. They are not stating 15W as ANY indication of brightness and no LED manufacturer would/does because the numbers are abysmal. We only get a fraction of what we input, but normal people don't know that and they play on it!