[Shop-talk] Need expertise: External halogen floodlight replacement

[Mark Miller]

Hi.  I've recently done this but cannot see your attachments as shoptalk 
scrubbed them away (this might be due to my getting posts in a digest 
format).

In my application I replaced a twin quartz fixture with a knuckle 
mounted 50W LED rated 4500 lumens and separate motion/light sensor, both 
mounted to the existing round box with a new round (threaded hole) 
coverplate .  If the sensor you have is to your liking and still works 
you can reuse it and just change the light.
https://www.globalindustrial.com/p/electrical/lighting-outdoor/flood-lighting/led-flood-light-50w-4500-lumens-5000k-with-knuckle-mount
https://smile.amazon.com/dp/B007HH01X0/ref=cm_sw_em_r_mt_dp_5HXJ6ZFDYTHQ5RJW2QDA?_encoding=UTF8&psc=1 


You should be able to make it fit your application;  you might need a 
couple of 1/2" pipe fittings to space it away from the box a tad.  (this 
is said having not seen the image of your installation).

And: lumens are lumens.  If they are in a spot or more of a flood you 
will have different brightness (think lumens per square foot), but if 
the light isn't there it just isn't.

Regards,

Mark Miller   707-490-5834
markmiller at threeboysfarm.com


> From: "The Corvair Kid" <kentsu at corvairkid.com>
> To: <Shop-talk at autox.team.net>
> Subject: [Shop-talk] Need expertise: External halogen floodlight
> 	replacement
> Message-ID: <028401d703f6$5b1463a0$113d2ae0$@corvairkid.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi all,
>
>   
>
> I am looking into replacing two long-serving halogen floodlights on the
> exterior of my shop with LED units. I could use some help from the group in
> understanding what choices provide an apples-to-apples replacement (or
> better), in terms of overall brightness and similar coverage.
>
>   
>
> The existing units are Heath/Zenith Model SL-5525. A picture of one of them
> is attached, as are pictures of a couple of pages of the installation
> instructions (yes, I saved them from nearly 20 years ago!). These units each
> use a single 250-Watt T3 bulb, which the Interwebz claims provide 4000
> lumens. The lights are mounted approximately 15 feet above ground and shine
> onto a bare concrete driveway.
>
>   
>
> As you can see, these units have both motion and light sensors, the
> functionality of which I intend to carry forward into any LED replacements
> being considered. In addition, I do not wish to remove or replace the
> existing electrical box extensions mounted on the shop exterior. The wood is
> clear cedar and I don't want to deal with fading or differing hole sizes. I
> realize that this constrains my replacement choices a fair amount, since (it
> appears) relatively-few LED lights use a standard round mounting plate. The
> mounting location under the eave also restricts the size of any replacement
> fixture. (Some high-lumen LEDs that I have found are quite large in size.)
>
>   
>
> With help from an electrical and lighting supplier near me, one candidate
> (the only one so far) is made by OLF. A spec sheet is attached. As you can
> see, the manufacturer claims that the two LED heads provide a total of 2160
> lumens. The lighting supplier said that, due to the directionality of LEDs,
> 1/2 the number of lumens are needed for equivalent brightness to halogen.
>
>   
>
> So, group - any comments or recommendations would be most helpful. Do you
> agree with the "LEDs can have 50% fewer lumens" claim? Any knowledge or
> experience about the coverage ("cone") of a single halogen vs. 2 LEDs at ~15
> feet height? Anything else I should consider?
>
>   
>
> Thanks,
>
>   
>
> --Kent
>
>