[sudo-discuss] lighting options

[Patrik D'haeseleer]

As another point of comparison, the LED light fixture I put in the CCL lab
room is this one:

http://www.homedepot.com/p/Lithonia-Lighting-2-ft-x-4-ft-White-LED-Prismatic-Lens-Troffer-2GTL4/203820958?N=5yc1vZc7buZ1z115g2

It's a 4000 Lumens, 45 Watt fixture made to resemble a fluorescent tube
one. Internally, it has four 36-LED strips behind a nice diffuser, and a
big-ass 30VDC/1.58A LED driver. (In comparison, that first bulb Jake posted
is 800 Lumen, so this one is equivalent in light output to about five of
those)

These sell for $119 at Home Depot, which is of course far too much. Should
be easy to reverse engineer these for far less, but I'm not sure how well
that would go over with our fire inspection, even if some of the chinese
knockoffs may very well pose more of fire hazard...

Patrik

On Sun, Feb 15, 2015 at 1:17 AM, Jake <jake at spaz.org> wrote:

> so i guess sudoroom (and CCL too probably) need some new lights, since the
> flourescents are failing.
>
> Home Despot sells 11-watt "warm white" bulbs for $9 each, which would be a
> good idea if we had regular lamp sockets to screw bulbs into...
> http://www.homedepot.com/p/Cree-60W-Equivalent-Daylight-
> 5000K-A19-Dimmable-LED-Light-Bulb-with-4Flow-Filament-
> Design-BA19-08050OMF-12DE26-3U100/205597079?N=5yc1vZbm79
>
> but china can always do better.  I looked on Ali Express and sorted by
> customer satisfaction, looking for LED lighting in "downlights" which
> suggests lamps shining downward?
>
> these look good but the seller rating is only 97.4%:
> http://www.aliexpress.com/item/High-Quality-Aluminum-9W-
> 15W-21W-27W-45W-LED-Downlight-Ceiling-lights-lamp-AC85-265V-
> With/2027740342.html
>
> they seem to be "16 to 21" watts for $6.95 including shipping.  They offer
> "warm" and "cold" flavors so we could just get a mix of the two kinds, for
> something in the middle when they're all on.
>
> here is the search i was doing:
>
> http://www.aliexpress.com/category/200002289/led-downlights.html?site=glo&
> isrefine=y&shipCountry=US&SortType=total_weight_score_desc
>
> this one is also a good price, and the seller rating is higher (98.1%)
> http://www.aliexpress.com/item/21W-Antifogging-Epistar-
> led-downlight-AC85-265V-Contains-the-drive-power-free-
> shipping/2047334906.html
>
> ultimately i have higher confidence in the quality of something we buy
> from Cree at Home Despot, but I think we should give China a chance and buy
> a few of the "16 to 21 watt" ones and see how they compare.
>
> For reference, Cree (a reputable company) and other LED bulbs sold at Home
> Despot are called "60 watt replacement" bulbs while actually using 9 to 11
> watts.  The light fixtures presently in Sudoroom and CCL each have two
> 75-watt flourescent bulbs, for a total of 900 watts of light in the bocce
> ball room when they're all working.
>
> That suggests that 150 watts of LED lighting would be equivalent, which
> would cost about $60 from the first aliexpress link i provided.
>
> These lights just have wires coming out, so we would perhaps attach them
> onto the metal structures that are presently holding flourescent lights for
> simplicity, until we come up with something better.
>
> -jake
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