Well? I'm going to put them on top of a shelf, between 1 x 6's to
illuminate my antique bottle collection from the bottom. Was just wondering
if a dimmer would work. It SHOULD.
Heart surgery pending?
When renovating a bar my brother put rope lights around the underside of
it for mood lighting. They were too bright and he added a dimmer at
about half brightness. The bulbs have lasted over 20 years so far. Not
a single one burnt out.
You can put them on a dimmer or you can wire 2 equal length strings
in series to cut the light down a little more than half. Just be aware
as soon as you cut into rope light, you lose the U/L listing. they
removed listing for any field assembly or alterations of rope light a
few years ago, although you can still buy the parts.
Being a wild man, I have the toe kick lights in my bathroom in a DPDT
switch that allows me to run them full brightness or in series. They
are also on a motion detector.
Rope light on motion sensors is great for night time walking around
light. I also have it in the hall behind crown molding and in the
And dimming with a 12 volt is no problem at all if you use the right
dimmer and it is a "magnetic" transformer. Dimming switch-mode, AKA
electronic transformers is a bit mor problematic (unless you have a
variable output "switcher"
I have a friend who is a union electrician. He gets lots of "stuff", a lot
of it things that are designated for the dumpster.
When we built my MIL's casita, he brought a transformer the size of a shoe
box, and lines of connected lights. Musta cost a lot, and probably would be
hard to find. Anyway, we put them under and over her cabinets, and it
provides the nicest subtle lighting. It is dimmed, too.
I don't understand what it is, but he does, and I trust him to install.
He brought me 5 metal halide lights with transformers that they took off the
top of a hotel in Vegas. Absolutely makes night into day, and probably in
the $400 per copy range. Really lights up my shop and container area
without it being that harsh white sodium lighting.
And a huge frickin subpanel. And lots of other stuff. All destined for the
It's nice to have friend in the business.
Heart surgery pending?
On 3/25/2011 3:56 AM, firstname.lastname@example.org wrote:
Well, this had been discussed here before. Actually, you can dim
LEDs, but they are not easy to dim. What I mean is they dim
differently from incandescent lamps. LEDs behave in a pretty linear
fashion, i.e. half the current, you get half the light. But the eye
behaves in a logarithmic manner, so you see a very small difference
at half current. Also, if the voltage across one LED goes below the
forward voltage of the LED, they will quickly go out. So, it
depends on how many LEDs in a series circuit (the total of all the
forward voltages of the LEDs) and how big the series limiting
resistor is. Also, the dimmer might have a very, insignificant to
an incandescent lamp, leakage current. But for LEDs, that might
produce a very small glow at minimum setting. That might be nice
for some thing, but not others. Once LEDs become very common for
house lighting, dimmers and LED lamps will have to be designed to
play with each other nicely.
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