Re: dimming system
- From: nick <ksparkel@xxxxxxxxx>
- Date: Mon, 08 Oct 2007 23:27:53 -0000
On Oct 8, 11:55 pm, Thomas Paterson <t_p_pater...@xxxxxxxxxxx> wrote:
On Oct 7, 10:04 pm, nick <kspar...@xxxxxxxxx> wrote:
On Oct 8, 2:10 am, Thomas Paterson <t_p_pater...@xxxxxxxxxxx> wrote:
On Oct 6, 5:09 am, nick <kspar...@xxxxxxxxx> wrote:
Hello
I would like to know if it is possible to have a system whereby an
incandesecent light source would get brighter as a person approached
and then dimmer as they walked away. Is there perhaps an existing
product on the market that could do this?
Many thanks in advance for any help with this.
There are a number of ways of doing this, all of which would take a
little jigging. First, clarify if you mean simply that when a
location is tripped as being occupied, the lights will surge to a
higher level then return to the previous state when no longer
occupied? Any dimming system with an occupancy sensor and some scene
setting can do this - it's a two event, two scene scenario - base
scene is a low level, occupancy sensor triggers a new scene when it
detects activity and the lights fade up. When the system (this can be
implemented in a variety of ways) determines that the space is no
longer occupied, it just simple fades back to the other scene. We're
increasingly doing this in museums to preserve the artifacts.
If you mean that the intensity is proportional to the proximity or
some such, yes there are systems that do it (there is a wall that does
this in Hotel Puerta America for example) and another in the design
museum on 5th Avenue in New York, where bands of light follow you up
the stairs.
This could be done using a ranging detector rather than an occupancy
detector to generate a sliding scale signal which is simply converted
into a dimming value by the dimmer's electronics. Pricier, but doable
on many dimming systems.
Be clear on what you want, get your requirements clarified and call
the sales reps of the companies in your area. Not knowing where you
live, I'd suggest the general companies, Lutron, Dynalite, iLight (the
controls company, not the LEDs company), Mode, Vantage, Leviton,
Clipsal, etc.
All the best,
Thomas Patersonhttp://www.luxpopuli.com
Hi Thomas
Many thanks for your reply. Yes it is something like the second
scenario you described. The light installation is in the centre of a
space. When a person or persons gets within a certain distance of the
installation the system detects them and as they move closer to the
installation the lights will fade up in proportion to their proximity
to the centre. The opposite happens as they move away.
I am based in Singapore but I will certainly check on the lighting
companies you have mentioned.
Once again many thanks. I am an visual fine artist by the way. My
website iswww.little-red-dots.com
The light installation is for the Singapore Design Festival in
November to which we have been invited to exhibit.
Ok, November is too close to be thinking about particularly custom
solutions. I'd suggest a few options.
1. Talk to the electrical engineering faculty at the nearest
university - this is the sort of thing that certain types of students
like to do out of interest as a custom electrical design task. In
terms of custom hardware, it isn't too challenging.
2. Get a manufacturer invested in the design - everyone's so damn
busy at the moment, you may not get what you need this way. Dynalite
are well represented in your part of Asia, as well as Lutron. Neil
works for Dynalite, who are great at this sort of stuff, but it would
be unusual for any lighting controls manufacturer to invest
significant time and resources in such a project - although I'm sure
there would be lots of good will.
3. Find a simpler way of doing it. For example, if I wanted to do
this cheap, interesting and bold and had enough ceiling height, I'd
hang a series of motion sensor/PAR lamp combos (like you get from
hardware stores for US$20) at a sequence of heights. Using (for
example) 25° PAR 38s hung vertically downwards, you'd have a series of
lit zones, adding up to the center. The highest fixture would have
the widest illuminated zone and would, as a result be the dimmest.
The motion sensor, being higher would also have a wider field of view
and would activate at the perimeter of the zone. Moving down, each
sequential fixture would then have a tighter sensing and illumination
zone. They would step on one by one down to the intense center.
It'd take a bit of tweaking and playing, but should work nicely.
Quite sculptural looking too.
All the best,
Thomas Patersonhttp://www.luxpopuli.com
Thanks Thomas
I love all your suggestions, particularly the last once as the work to
a large extent is a sculptural work. Additionally I like playing with
off the shelf components and have enought knowledge of how things work
to be able to do have a go with what you suggest.
Yesterday I did check out all the companies you mentioned to see which
were in our area. Lutron, Dynalite, Vantage and Clipsal are well
represented here and they responded positively and reps from the
latter 3 will be visiting our studio over the next couple of days. Yes
it's a shame its a bit later in the day for all this, as the
exhibition would prove to be quite a good showcase for a company which
was able to invest. Anyway I'll see what they all say but I certainly
have plenty of options now.
Once again thanks very much for your help. I'll keep you updated with
progress. If your OK with it I would like to mention you and your
company in the credits for the installation, as I do with everybody
who has input significantly. Please let me know if that is OK.
.
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