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Philips WarmGlow old and new

Philips WarmGlow old and new

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Old: 8.5 watts, 4 X 2700K filaments, 2 X 2200K filaments, 2200K filaments extinguish as full brightness is reached. New: 8 watts, 2 X 3000K filaments, 2 X 2200K filaments, 2200K filaments remain lit at full britness.

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Album name:mdcastle / LEDs
Keywords:Lamps
File Size:660 KB
Date added:Dec 15, 2019
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Date Time:2019:12:15 14:52:42
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Lightingguy1994
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Dec 15, 2019 at 05:54 PM Author: Lightingguy1994
Cool, I like it when they make their LEDs work like older stuff I'll have to pick up a pack

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ace100w120v
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Dec 15, 2019 at 06:48 PM Author: ace100w120v
I like how they now have diagonally angled filaments to get rid of the dark spots. Interesting they went with 3000K, maybe to mimic incandescent at full brightness better?
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Dec 15, 2019 at 06:59 PM Author: mdcastle
Probably 2 X 3000K + 2 X 2200K = 2700K. Although the new ones are still noticeably cooler than the older ones. They also behave wildly different while dimming.
ace100w120v
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Dec 15, 2019 at 07:02 PM Author: ace100w120v
i.e new dims all at once?
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Dec 15, 2019 at 07:48 PM Author: mdcastle
No, besides the changes in how the filaments behave (whether the 2200K turns off or not) the overall lamp has a different minimum on level and dimming rate relative to the input.
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Dec 18, 2019 at 03:23 PM Author: James
At last Philips' preferred suppliers seem to have caught up with competition! The original version contains two independent LED drivers to control the two different LED colours. This is not only expensive but also requires a more complex internal construction with two different filament circuits, and an extra leadwire through the stem. Back in 2015 I designed an alternative for the Sylvania Sundim lamps, which contain just one standard dimmable driver and only 2 wires connected to the LEDs. The warm white LEDs are in parallel with the cool white, but the cool white have one extra LED chip on each filament so as to raise their voltage, and an internal resistor. The effect is that the power balance between the warm white and cool white filaments automatically shifts as the drive current is reduced. At full output the same current flows through both filaments. However when dimming downwards, the cool filaments dim first and eventually go out while leaving only the warm white running. This not only gives better colour variation during dimming to more accurately mimic incandescent, its also a considerably cheaper and easier construction. I will see if I can find a video of this to upload! I wonder if Philips' new supplier has now copied that approach.

NB the angled filaments help to avoid shadows of the central glass support rod. It mainly gives a difference for the white satin coated lamps to achieve improved uniformity of the lighted bulb surface. However this is patented by Ledisong of China.
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Dec 18, 2019 at 10:21 PM Author: mdcastle
The new versions still have three lead wires to the filaments, with a completely different driver board (white instead of green, different component layout)
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Dec 19, 2019 at 03:24 PM Author: Miles
Where did you purchase that one? I like the fact that it's 3000K, all of the ones I find are the banana yellow 2700K when full brightness.
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Dec 19, 2019 at 09:16 PM Author: Patrick
These are still 2700K due to the 2200K remaining lit. I think they look a bit more yellow while the original were a tad more pink, but the difference is subtle and not evident unless I compare them side by side. The (non-filament style) Sylvania "sunset effect" / "premium dimmable" lamps do go up to 3000K.

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Dec 21, 2019 at 09:06 PM Author: LightUpMyLife
Do they have these new ones in 5000K Daylight?
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Feb 07, 2020 at 03:34 AM Author: trojmiejski
For European market Philips released a dimmable 8.5W 220V-240V LED with the same layout of 4 filaments and a 7.5W SceneSwitch lamp. I bought the SceneSwitch version yesterday and I will upload photos soon. It has 3 settings, 2700K 7.5W, 2500K 3W and 2200K 1.6W.
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