View Full Version : Hey Mike...Some more LEDs for you
04-15-2008, 11:50 PM
Saw this over on MUD :D
Xmitter LED offroad light (http://forum.ih8mud.com/80-series-tech/216481-xmitter-led-offroad-light.html)
04-16-2008, 08:35 AM
sweet - that would make a killer dome light :hill:
04-16-2008, 10:11 AM
Then you'd post more burnt eyeball pix...
04-16-2008, 10:14 AM
so I was welding all day yesterday.... my eyes hurt and I thought I was being careful.
04-16-2008, 10:21 AM
Maybe you just left your dome lights on too long? :D
04-16-2008, 07:11 PM
would it really be difficult to make one of those? leds are cheap.
04-17-2008, 07:56 AM
Really bright LEDs are not, however.
Hey Root, what are you running for a helmet? When I use my cheapie HF helmet, I get the same problem (not fast enough autodarken, works in a pinch, solar powered so no batts). With the nice one, no issues.
Take care of them eyes, bro. We don't wanna hafta lead you around at CM28. Cataracts would SUCK.
04-17-2008, 08:37 AM
04-17-2008, 08:49 AM
These 12" light bars have 20 LEDs and claimed 3600 lumen, so each LED is 180 lumen. They say it takes 60W, which is 250mA per LED at 12VDC. Seems they go for about $450 or so.
For comparison, a Philips LXHL-PW03 does 120 lumen at 700mA and costs about $25 each, or about $20 in quantity. So I'd guess that the Philips is in the same class as the ones they are using, so I have some doubt about their spec claims. Either they draw more current or put off less light. But I'd be absolutely shocked if a company made wild claims. Just floored...
But either way, 120 or 180 lumen per LED, times 20 is at least 2400 lumen. A Hella 55/60 H4 does 1000/1650 lumen (low/high). That bulb draws the same 5A on high and so there is definitely some efficiency gain. But then again a Hella H4 goes for about $6, which means you are spending 1% the cost for 67% of the light of a LED bar. But since you have two H4 bulbs, you get around the same or more light (depending on the real numbers) for 2% the cost, with the obvious downside of consuming 120W.
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