Finance — 05/18/16 Page 4
Mayor Donchess
Another thing | think the committee did well in the last term was there was a proposal to sole source this to a
different provider. The committee asked that it be put out to bid. The amount of for the sole source that was
being considered last term was | think $2.1 million or $2.2 million. Now it’s a little less than $1.5 million. By
putting it out to bid, we saved $600,000 - $700,000.
Alderman Cookson
What's the estimated lifespan of the LED?
Mr. Danielson
Twenty years. The lights start off say at 100 percent. By the time it gets to 20 years, there’s a term in the
industry where it depreciates to 70 percent of output. It still produces light but that’s when it is considered not
as good, so 20 years.
Alderman McCarthy
| had asked this question last time but | haven’t followed it since. When we bid these out, what did we specify
in terms of things to do with light pollution and how does this vendor fare against everybody else that
responded?
Ms. Walker
With LEDs the light is much more concentrated so you have a much lower cutoff. LEDs have less light
pollution inherent in the LED fixtures.
Mr. Danielson
| didn’t specify anything to do with light pollution, but the directionality of the light should be more downward
than the current lights where it has reflector and goes kind of in a circle
Alderman McCarthy
So we didn’t have any light pollution criteria in the bid. What did we do about radio frequency interference?
Ms. Walker
We did not address that.
Alderman Siegel
Last time we spoke about this a lot of the issues with light pollution, if you want to call it that, have to do with
how the housing is set up and where it is aimed and the reflecting of the surface it is aimed at. Given that most
of these are street lights and are aimed at a black asphalt surface, | don’t think scattering of light off the surface
in general will be a problem. It’s more of a problem off of like a sidewalk. | think that was less of an issue.
Then the question becomes are we using 3K or 4K lighting. The 3K more akin to the yellowish end. | know
there was some issued raised by one of the gentleman whether or not this would affect your sleep patterns.
Unfortunately that gentleman | can say categorically had his facts wrong and didn’t read the original study
where it’s actually 5K light that’s the problem not 4K. We are talking about lighting streets. We want light that
people can see in. | know if you go through any of the wards right now, you look at our current street lights, my
eyes are bad; I’m older and | can’t see. I'd like to be safe.
