[SML] Dimmable medium screw base LED lamps

[Bill Conner]

The problem is, manufacturers change the product without notice or name or
number change, especially when a company is bought by another company. In
2014, after a lot of research,I selected the attached lamp for a very
similar application - existing wall sconces with frosted glass - and a very
tight budget.  These were dimmed by a basic ETC D20 dimming module.  I was
quite pleased with the low end dimming performance.  They faded out
acceptably and the "pop" on was minimal.

ETC helped.  They (at least used to) test LED lamps and fixtures for
dimming, and have (or had) an extensive database with both objective and
subjective results.

Good luck.  Retrofit LED dimming was not easy - maybe it's improved since I
was active with it.

And Ford - let's get together this summer when you're up here!

On Thu, May 4, 2023 at 12:53 PM Duncan Mahoney via Stagecraft <
stagecraft at theatrical.net> wrote:

> I would buy a few "faux Edison" lamps and experiment.  In my experience
> dimming down can work well, but dimming up they tend to pop on.  But it
> depends on what the dimmer is doing with the power.  And the output is as
> omnidirectional  as an incandescent
>
>
> Duncan Mahoney
> Head of Technical Direction
> Professor of Theater Practice in Production
> University of Southern California School of Dramatic Arts
> ------------------------------
> *From:* Ford Sellers <ford.sellers at gmail.com>
> *Sent:* Thursday, May 4, 2023 8:59 AM
> *To:* Stagecraft Mailing List <stagecraft at theatrical.net>
> *Cc:* Duncan Mahoney <dmahoney at usc.edu>
> *Subject:* Re: [SML] Dimmable medium screw base LED lamps
>
> Thanks Duncan,
> Chandeliers are on dimmers (architectural).
> This is just single color warm white (2700k or 3000k-ish).
> The chandelier has a diffuse tube around the lamps, so filament doesn’t
> matter, but omnidirectional output is required. And dimming below 10%.
>
> Ford Sellers
> Sr Product Manager
> CHAUVET Lighting
> 5200 NW 108th Avenue
> Sunrise, FL 33351
> USA
> from my iPhone
>
> On May 4, 2023, at 9:51 AM, Duncan Mahoney via Stagecraft <
> stagecraft at theatrical.net> wrote:
>
> 
> Is the chandelier constant power or on a dimmer?
>
> If you are looking for some lamps that dim and color change wirelessly on
> constant power, I'll find out what we have been using in onstage
> practicals.  After some challenges getting them all set up, they have been
> reliable under show conditions
>
> If you are looking for LED lamps that can be dimmed on a dimmer of some
> sort, most of the "faux filament" Edison LED lamps will dim well until the
> input voltage is below the forward voltage of the diodes.  I've not seen
> anything LED yet that avoids a quick transition (or possibly flickering,
> depending on the dimmer) from dim to off to dim on a dimmer
>
>
> Duncan Mahoney
> Head of Technical Direction
> Professor of Theater Practice in Production
> University of Southern California School of Dramatic Arts
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-- 
Bill Conner Fellow of the ASTC
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