Rule of Thumb for Aux Light Mounting? - Defender Source
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  #1  
Old June 24th, 2012, 02:12 AM
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Rule of Thumb for Aux Light Mounting?

Hello everyone,

I've recently replaced my bumper with a winch bumper. The original bumper had a light bar and "genuine" auxiliary lights. The light bar is too short and too narrow to work with the winch bumper, so I will be fabbing up a new one a little taller and a little wider to clear the winch.

Where I need some advice is deciding how far apart to mount the lights. The previous bar had them spaced at about 15 inches apart. But I can go wider now if I want to. If aesthetics are the main basis of this decision, then I'm perfectly capable to choose a width myself. But are there any functional criteria to be considered? A rule of thumb something like "go as wide apart as you can without the auxiliary lights casting a shadow from the headlights?" Any other factors I should be considering?

BTW, I'll be using either Hella Rallye 4000 Cornering Lamps or Rallye 4000 Compacts. I haven't decided which and would love to hear feedback from anyone who has either one.

Thanks in advance for any and all input.

Spalding

The spacing between the lamps in this drawing is preliminary. The large lamps are the Hella corning lamps. The small ones are the compacts. The red outlines are the genuine lamps that were on the truck when I bought it.

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  #2  
Old June 24th, 2012, 05:02 AM
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Jason England
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I think you should just position them where you think they look good'
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  #3  
Old June 24th, 2012, 11:35 AM
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Dave Sherwood
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Interested in selling your genuine light bar? If so, I am interested.

I have the cornering beams up top and they do spread out the light very well...
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  #4  
Old June 24th, 2012, 11:01 PM
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As long as you have them reasonably far apart to be able to aim the beams the distance that you want to see while retaining the optimal light pattern at that distance, I don't think this is an exact science. There is usually a lot of room for adjustment of the light and spread at the desired distance.

I have mounted both floods and pencil beams at different times on the same ARB bumper light tabs, and there was always plenty of room for adjustment. Hence, I agree with the above post that you have the flexibility to fabricate something that you like. I believe that it's better to mount far reaching pencil beams up high/roof or rack level, floods lower/bumper level, and fogs as low as possible (realizing this is an off-road vehicle). Of course, there is flexibility there, too. I once mounted my giant Hella 3000s on the roofrack of my Discovery, and it completely changed the night off-roading experience.

Also, even though I never experienced any problems with even large lights on the front of my Discovery or Series, maybe there is some consideration for anything that could be interrupting airflow into the radiator that might need to be taken into account in very hot temperatures(?).

Now this is based upon my somewhat limited experience, so if there's a better answer, this is the right place.
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Old June 26th, 2012, 12:20 AM
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I just ghetto-fabbed some right-angle pieces and mounted the lights to the bumper bolts:
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  #6  
Old June 26th, 2012, 12:04 PM
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Quote:
Originally Posted by DMSLongLake View Post
I just ghetto-fabbed some right-angle pieces and mounted the lights to the bumper bolts:
That's not a bad idea. I might look at doing a modified version of that.
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Old June 26th, 2012, 12:44 PM
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Brett Fritzler
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X2 on the Cornering beam 4000's. I've had Hella 500 driving, Hella 550's driving and fog, and Hella 4000 Euro beams. I traded the 4000 Euro's straight up for the Cornering. The Cornering beams give a great array of light in front and to the sides of the vehicle. IMO they're perfect for off roading at night.
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Old June 26th, 2012, 09:03 PM
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Good information here.

After I first started this thread, I found a series of videos on YouTube by Off Road Warehouse that show the performance of several types of lights. I took a representative screenshot from each video and pasted them together. (Sadly, the cornering light is not represented.) The videos all seem to have been shot at the same place at the same time to make the comparison as valid as possible. To my eyes though, the plain Jane Hella 500 classic gives the most useful light. I emailed ORW to ask if that interpretation is correct, but no reply back. I've had the Hella 500s before, and I'm no fan of how often they need to be re-aimed. Any thoughts?

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Old June 26th, 2012, 10:32 PM
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I went with choosing ALL of them :-)

2 pencils on the roof (4000)
2 cornering on the roof (4000)
2 euro on the bumper (500 black magic)
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Current Rovers:
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2003 Range Rover HSE
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  #10  
Old June 26th, 2012, 11:14 PM
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Quote:
Originally Posted by JSBriggs View Post
Clearly the 500 classic are best for doing shadow animals
See, that's the thing. I would have thought so too. In the photos, to my eye at least, yes, the 4000 Euros put out the most light to be sure (and why not since they have a huge wattage advantage.) But not where I want it. I would have thought that the best of the rest would have been the Rallye compacts, but of the four they are the worst. Of the smaller lamps the 500 classics put the most even blanket of light across the road close to the truck, which is what I'm looking for.

Quote:
Originally Posted by DMSLongLake View Post
I went with choosing ALL of them :-)

2 pencils on the roof (4000)
2 cornering on the roof (4000)
2 euro on the bumper (500 black magic)
My Defender is my daily driver. I have to park underground sometimes, so lights on the roof are out. I'm guessing that if I asked you to give up one or the other, cornering or 500, you'd keep the cornering lights, right?
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  #11  
Old June 26th, 2012, 11:38 PM
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Quote:
Originally Posted by Captain Spalding View Post
My Defender is my daily driver. I have to park underground sometimes, so lights on the roof are out. I'm guessing that if I asked you to give up one or the other, cornering or 500, you'd keep the cornering lights, right?
Mine is my daily driver too...but I telecommute :-)

When I do venture to the office, I need to park in one of our other buildings a couple of blocks away and take a shuttle...

I have found that google street view allows you to see the clearance signs in most parking ramps...

Back on topic...I would keep the cornering if I had a choice...as most of the time I am on a cramped trail or not leading the ride so I have the pencil beams off...

I do keep the 500s running all the time with my brights...so for on-road...the 500s...off road 4000s
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  #12  
Old June 27th, 2012, 08:22 AM
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Quote:
Originally Posted by JSBriggs View Post
Clearly the 500 classic are best for doing shadow animals.

They all look about the same, but other than optics, size and durability could come into play as well. Have you already upgraded the main lights an harness? Switching to an H4 and relays was a huge improvement.

-Jeff
x2, significantly more than adding my 3 x Hella 500's
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