3000K.... VERY yellow... I wouldn't be able to see anything. I look
for highest possible... 5000K minimum
73,
Clay
On 10/23/2017 11:36 PM, Dave Cole (NK7Z) wrote:
Here is the review of these lights...
https://www.youtube.com/watch?v=zJWssuCGkC8
73s and thanks,
Dave
NK7Z
http://www.nk7z.net
On 10/23/2017 09:35 PM, Dave Cole (NK7Z) wrote:
Currently Dollar Tree has a set of 60W sunbeam LED lights on sale for
a buck each, and they are dead quiet. I bought 20 of them today, and
swapped out every light in the house. Lost about half an S unit of
noise.
73s and thanks,
Dave
NK7Z
http://www.nk7z.net
On 10/23/2017 05:07 PM, Kevin Stover, AC0H wrote:
Maybe I'm just lucky.
Over the last two years I changed out all the incandescent and CFL
bulbs in this house save two. They are the two 150W Halogen lights I
have to illuminate the garage/driveway/deck if someone gets too
close to the house at night.
No RFI detected on a K3 or a K2.
On 10/21/2017 11:51 AM, Bob McGraw K4TAX wrote:
One thing observed at our repeater location is that the CFL was
quiet until the the transmitter was on the air. It then generated
noise. In a simplex condition it wouldn't be observed. But in a
duplex operation or multiple receiver situation it becomes an
issue. Replaced by a LED with lessened issues.
Bob, K4TAX
Sent from my iPhone
On Oct 21, 2017, at 11:21 AM, Jim - N4ST <hamsh...@n4st.com> wrote:
I have noticed the background noise level growing on the HF bands,
and for me, especially on 18 Mhz. I need to declare war on RFI
and find out what is causing this. I did carefully checkout some
Walmart "100 W" LED lights before committing to them and they were
fine.
_________
73,
Jim - N4ST
-----Original Message-----
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw
K4TAX
Sent: Saturday, October 21, 2017 11:32
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: LED Light Bulbs
Makes me wonder if at all or how frequently production lots are
evaluated to determine if they are in FCC Part 15 compliance.
Otherwise, the approach "we evaluated one production lot, deemed
it passed" {a.k.a - I saw it work once, ship it} and then produced
a million or so afterwards including those with some engineering
changes and cost down changes.
Guess I need to power the radio from the tractor battery and dump
the main breaker in the house to see how much the noise changes.
73
Bob, K4TAX
On 10/21/2017 9:48 AM, w4sc wrote:
An observation:
I too had RFI from LED lights, but the interference was to OTA
television, Channel 10 (192-198 MHz) DTV.
Not all LED bulbs are created equal in this regard, RFI reduction
/ elimination. The RFI was generated in this case by the SMPS
integral to the bulb.
The offending bulb is Utilitech part # 5DG6 (printed on the bulb)
and is ‘C UL US’ listed, purchased from LOWEs.
I have a overhead fixture that was populated with four 800 lumen
(60w?) bulbs, 2 being Utilitech, and 2 Sylvania OSRAM.
By removing the bulbs and observing channel 10 reception, the
offending bulb was determined to be the Utilitech.
I replaced the the the Utilitech bulbs with Sylvania OSRAM, and
the RFI on channel 10 OTA was eliminated.
The Sylvania OSRAM part number used is LED8.5A19/DIM/0/827/G5/RP
as printed on the box UPC, and were purchased from LOWEs also.
NOTE: There may be interference from Sylvania OSRAM bulbs on
other frequencies. LED bulbs are required to meet FCC Part 15
FCC, Class B regulations.
YMMV
I have not seen a comprehensive report or article that unveils
“good” vs “bad” LED bulb manufacturer and part identification as
far as RFI emissions across the spectrum.
Ben W4SC
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