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Philips 455931 60 Watt Equivalent A19 LED Light Bulb Dimmable Warm Glow, Frustration Free, 2-Pack


Philips 455931 60 Watt Equivalent A19 LED Light Bulb Dimmable Warm Glow, Frustration Free, 2-Pack


This Philips 60 Watt equivalent household A19 consumes 9.5 Watts of energy, saving you up to 8.87 in energy costs over the life of the bulb. Experience smooth dimming from 2700K to 2200K, tuning the light to a light similar to that of warm candlelight glow. This bulb is ideal for household use in living rooms, dining rooms and bedrooms. You’ll have the flexibility to create the right lighting level and ambience with a smooth dimming all the way down to 10% of full light output. This Philips LED A19 offers a new experience for dimmable LEDs. Until now, this warm, relaxing ambiance effect was only available in dimmable halogen and incandescent light bulbs and it’s not available with the energy savings of LED technology.

  • This Philips 60 Watt equivalent household A19 consumes 9.5 Watts of energy, saving you up to 8.87 in energy costs
  • Smooth dimming from 2700K to 2200K, tuning the light to a light similar to that of warm candlelight glow
  • Ideal for household use in living rooms, dining rooms and bedrooms
  • Energy Star certified, instant-on and will not fade fabrics or colors
  • Philips Internal Model # 9001134533

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What customers say about Philips 455931 60 Watt Equivalent A19 LED Light Bulb Dimmable Warm Glow, Frustration Free, 2-Pack?

  1. 69 of 72 people found the following review helpful
    4.0 out of 5 stars
    Decent Dimming Performance / Color Temperature does shift lower when dimmed, August 6, 2015
    By 
    NLee the Engineer (Nashua, NH) –
    (TOP 10 REVIEWER)
      
    (HALL OF FAME REVIEWER)
      

    This review is from: Philips 455931 60 Watt Equivalent A19 LED Light Bulb Dimmable Warm Glow, Frustration Free, 2-Pack (Tools & Home Improvement)
    There are many dimmable LED bulbs that can be used in TRIAC-controlled light fixtures. But there is a very noticeable difference between LED and incandescent bulbs when they are dimmed:

    – As lower current, the incandescent bulb’s filament becomes cooler. Its light shifts to more yellowish and then reddish at minimum power. (Ironically, RED is considered warmer than BLUE. Therefore a lower color temperature of 2200K is said to be WARMER than 2700K)

    – An LED does not change its wavelength when driven at lower current. As the LED bulb is dimmed down, its color temperature remains nearly unchanged. So the light appears ‘cold’ when compared to an dimmed incandescent bulb.

    The main attraction of this product (Philips ‘Warm Glow’ 60 Watt Equivalent Dimmable A19 LED Bulb) is that when it is dimmed down, its color temperature actually shifts lower from 2700K to 2200K. This makes the bulb appear more yellowish, closer to what happens to an incandescent bulb when dimmed.

    How does Philips do it? My engineering guess is that there are two banks of LEDs inside. At full power most of light comes from the 2700K bank. As the bulb is dimmed down, light from the 2700K bank is gradually turned down, leaving the 2200K bank to take over. Strictly speaking, this shift in color temperature is not equivalent to that of an incandescent bulb when dimmed. But at least it is significantly closer than other dimmable bulbs in the market.

    [Power Consumption]
    Previously I have encountered several LED bulbs (such as the LE ’75W-equivalent’ LED Light Bulbs) with poor power regulation. When the bulb warms up, its power consumption drops and so does its light output. That’s why I monitored the power consumption of this Warm Glow bulb over time, to make sure it does not suffer from the same problem.

    – Initially, the measured power consumption is 11.8W according to my EUM-A1 Power Usage Meter. This is a surprise because the bulb packaging says ‘9.5W”!
    – After 15 min, power drops to 10.4W
    – After another 15 min, power toggles between 9.2W and 9.7W occasionally
    – Eventually it stabilized at 9.4W. So the rated 9.5W power is accurate after the bulb has warmed up.

    The power factor is consistently high at PF=0.93, which is a sign of good electrical design.

    [Dimming Performance]
    Refer to the picture I uploaded, and you will see that the Warm Glow bulb does become more yellowish when dimmed. Its dimming range, however, is rather limited compared to incandescent bulb. Other LED bulbs maintain essentially the same color temperate whether at full or minimum power.

    In terms of relative dimming range:
    Philips 10.5W ‘Slim Style’ : down to ~20%
    – Philips 9.5W ‘Warm Glow’ (this product): down to ~10%
    Philips 11W A19 ‘Funnel’: down to ~5%
    – Incandescent bulb: less than 1%

    In terms of audible noise when dimmed: Slim Style gives out loudest buzzing noise that is clearly audible in a quiet room. The Warm Glow is slightly better. The Funnel is the lowest among all LED bulbs I tested.

    [Bottom Line]
    The Philips Warm Glow works as advertised, but it is priced relatively high as of this time. So is it worth buying?

    – If you prefer to see your LED bulb turn more yellowish when dimmed, this Warm Glow bulb is the only choice that I know of.
    – If you need wider dimming range and don’t care about color temperature when dimmed, get the Philips ‘Funnel’ bulb at about the same cost
    – If you don’t need dimming, consider the Philips Slim Style or Philips 8.5W A19 at about half the cost.

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  2. 61 of 64 people found the following review helpful
    5.0 out of 5 stars
    EXACTLY like the old incandescent bulbs. None of the nasty “Hospital White” lights., April 5, 2015
    By 
    HLN (Orlando, FL) –

    Verified Purchase(What’s this?)
    This review is from: Philips 455931 60 Watt Equivalent A19 LED Light Bulb Dimmable Warm Glow, Frustration Free, 2-Pack (Tools & Home Improvement)
    Finally, the LED bulb made for me. Tried this bulb out and ended up buying 18 of them to replace all my old power hungry bulbs around the house. I tried out LED bulbs years ago and ended up returning all of them. These bulbs dims perfectly with my older Lutron dimmers and Insteon dimmers with no buzzing sound.

    The color is “EXACTLY” like my old orange glow incandescent bulbs, just much much brighter now. These LED bulbs has an orange warm glow to them instead of the nasty hospital white that even some other of the advertised 2700K LED bulbs. These bulbs are so much brighter and they can be on for hours and I can touch them no problem. I mean it is cool enough for my 3 year old son to touch. No heat whatsoever.

    I have a huge chandelier on my high ceiling (19 ft) that had 12, 100 watts each bulbs in them (builder put in when we built the house 10 years ago) that we were using every day for years.

    Do the math 12 x 100 watts = 1200 watts. Now 12 LED x 9.5 = “114 watts” that is twice as bright and still gives off warm light with virtually no heat.

    Love love these LED bulbs. Buy these and the energy you save will pay for them in about 18 months and they really last 20 years. Again, I can’t stress enough how awesome they are. I promise, non of the nasty “HOSPITAL WHITE” lights from these bulbs. I include a photo to show you folks how warm glow these are.

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  3. 9 of 9 people found the following review helpful
    4.0 out of 5 stars
    Great advance in LED technology – still not perfect, November 26, 2015
    By 
    musicgeeksf (San Francisco, CA USA) –

    Verified Purchase(What’s this?)
    This review is from: Philips 455931 60 Watt Equivalent A19 LED Light Bulb Dimmable Warm Glow, Frustration Free, 2-Pack (Tools & Home Improvement)
    These lightbulbs are a huge step in the right direction. I was an early adopter of LED home lighting, and have been waiting for the “warm dim” feature for a long time. The technology has come a long way – first to attractive “warm” colors (2700K), then to dimmable lights, and now the mimic of incandescent light’s shift toward the red part of the spectrum at lower intensity levels. I’m really happy with these, but I’m giving it four stars because while these lights are pretty awesome, the technology still has a ways to go:

    – The dimmest these get is still pretty bright. I can’t wait until LEDs mimic the very low (think candlelight) levels available with incandescent
    – The warmer red light is still too “pure”. Incandescent light emits a broad spectrum – think of a bell curve with the middle of the spectrum output at around 2200K. This is pure 2200K. We need an LED that emits the outer edges of the spectrum to fully achieve a natural look.
    – The shift between the 2700 and 2200 lights is noticeable – there is a cliff in the middle of the dimmer settings where you can notice it
    – When the dimmer is at the lowest setting and powered on cold, only one of the bulbs from my 2-pack activates (after 1 second). The other stays off until I bump up the dimmer a bit, and remains illuminated after dimming back all the way down. This is kind of annoying as it means I can’t leave the dimmer at the lowest setting and turn on the lights at that level; I have to bump the dimmer up, turn them on, then turn it back down.

    Bottom line: I’m excited about this product and I’ll be buying several to outfit my home and replace the previous bulbs that dim at 2700K and cast a ghoulish glow at the lower setting – this bulb is a vast improvement. However, it’s not perfect and I’ll anxiously await the next version. Given the price, I’m willing to eat the cost to enjoy the technology now, but given the purported life expectancy of 22+ years, I can’t imagine actually using these bulbs that long before replacing them with something better.

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