PHILIPS LED 40W A19 4-Pack Ultra Definition Soft White (2200K) 450 Lumen (5W = 40W) Dimmable Frosted Flicker-Free Light Bulbs

I have not received anything in any form for this review, I bought and and paid for these bulbs with my own money, without any reimbursement before or after purchase and review, not even a coupon.I bought a 40 watt bulb of a different type and brand not long ago, and all of a sudden I started getting headaches. I know it sounds funky, but I don't usually get headaches. I started thinking about my daily routines, what I have been eating and drinking, and etc,The only thing different was that light bulb. I know it sounds hinky, but I absolutely can't find anything else that was different,Welllllll, that started my research nose twitching. So I started looking up how light can affect your health. Bingo! I found a lot.The flicker rate, color temperature, and the Color Rendering Index have a whole LOT to do with health effects. I read articles, and research papers, and yeah, I watched YouTube videos for ahhh, maybe a day, or a day and a half. Once I get my teeth in something I wring out as much info as I can find.I had ordered an incandescent. It was delivered on February 21, 2025. I put it in my little desk lamp, and turned it on. I thought nothing more about it. I use that lamp on my desk to light the room. I cannot stand bright glaring lights shining down on me. I turn the lamp to reflect off an off white wall, and it gives me all the light I need. If I need to read something I just have to twist the gooseneck and point it at the book or paper that I need to read, and I can control the way the light illuminates exactly how I need it.Well it took a couple of days I think, and I started getting headaches. I wondered where they cam from, I'm not usually a headache person, It's unusual enough for me to go through the hassle of figuring out why, No change in diet, not drinking more coffee, not eating anything different, no different cleaning supplies, no new fabrics. I could not find anything, Except the light bulb.Well, I have been researching since then, and I am convinced that the light bulb I had been using was the problem,I watched a few videos along with reading the research papers on light, check out MedCram on YouTube for a real licensed medical doctor on sunlight, and red light, infrared, and near infrared light, on health. Boy that's an eye opener for sure.I also watched a series of videos where a bunch of bulbs were tested with meters, for everything from flicker rate, to color spectrum, light temperature, and the Color Rendering Index. All of these are important if you want the best sun like light you can get to enhance your health, especially if you spend a lot of time indoors.I encourage you to look at this information, there is more information than I can write here. You can read, look and listen as many times as you need to to get the information straight in your head.Anyway an March 8, 2025 I ordered these bulbs, They arrived today, I immediately opened the package, and put one in my little lamp. I kid you not the headache is mostly gone. The 60 watt bulb is just right, It has a bright WARM light, not a stark harsh white light, so it is not hard on the eyes, The temperature is 2700 Kelvin, which helps keep the blue spiking in the light spectrum, that LED lights are known form, to a low level. 2700 - 3000 k temp is very early morning light. 4000 k is between very early morning light and before noon. 5000 k is noon bright, and 6500 k is full sun at noon on cloudless days. Just keep in mind the higher the kelvin the MORE blue light it is emitting even if it is balanced by a spectrum of the colors. It's the blue light you want to avoid as much as possible because you get a lot of it, from phones, tv's, tablets, and computer screens. SO you want as close to natural sunlight as you can get.The High CRI means that all the other colors of sunlight are present also. So you are getting a full spectrum of light. Look a the color spectrum that shows on the meters in the videos, this bulb has a CRI index of 95! The only other bulbs I could find with that high a CRI were 2 companies, one was 19.00 each, the other was 100.00 for 4 bulbs. In order to get a 95 CRI it has to have all the colors not just one.Incandescent bulbs have a good CRI but it is skewed to the red side of the spectrum like most LED's have a lot of blue. And incandescent bulb DO flicker, watch the video and the meter testing. The one guy even tested for "dirty electricity" with an EMF meter and different bulbs showed different amounts. These bulbs are a good deal for what you get, the specs that rival a 19.00 bulb, the complete color spectrum, 800 or so lumens, low flicker rate, and low emf emission.Overall, I am very satisfied with these bulbs No more headaches! These bulbs are also glass, not plastic, so the look like an old fashioned incandescent bulb.I still say, don't take my word for it, look around for information and make up your own mind.I am giving these bulbs five stars for: form, function, and value for money,

Philips Ultra Definition lightbulb line is arguably the best on the market now in terms of overall quality, new tech, longevity etc.And this particular variant is probably the best to get in that line. Specifically because they are the A19 size but at the higher output (up to 100W equivalent) and dimmable.They aren't quite as high on the lumen output as the A21 size variant (something like 1500 vs 1600 lumens). However if you're like me you probably have several light fixtures in your house that simply cannot fit the larger A21 bulbs. Thus this is where they shine.As far as dimming. With a smart switch (Inovelli reds) they get down to about 12% with a leading edge dimmer, before they darken completely. Until that point the dimming is pretty smooth and no noticeable flickering whatsoever. So it's good to know they function fine with leading edge dimmers. A lot of LED bulbs behave erratically with leading edge dimmers and experience: flashes, flickering, buzzing, abrupt dimming at the low end, etc. These don't have any of those issues.However if you're fortunate, these really do shine if connected to a trailing edge dimmer. I can get them all the way down to 2% unadjusted! They also report lower energy usage on the lower end of the dimming cycle, with comparable light output.So fortunately these bulbs are widely compatible with any dimmer you're likely to encounter.Perhaps the only downside of this particular item is that well it comes in packs of 8, (specifically four packs of two bulbs boxes).

I bought these in November 2023 and really like them; flicker-free dimming, warm cooler. However, 8 months later one of them began to flicker and only output about 50% of the light. Let's see if Philips will stand by their 5 year warranty!

I’ve purchased five boxes of these bulbs between July 2024 and April 2025. At first, I was really impressed: the color was warm and natural, dimming was smooth, and there was no whole-house flicker—exactly what I was hoping for.Unfortunately, they’ve started to fail MUCH earlier than expected—nowhere near the advertised 15,000-hour lifespan. So far, I’ve lost 8 of 20 bulbs, and the failures have taken multiple forms:• Some gradually dimmed over time and lost brightness• Others started color shifting between warm and cool tones• A few began full on/off flickering, making them unusableIt’s hard to tell if they came from the same manufacturing lot, but I’m hoping that’s the case—otherwise, this could be a broader quality control issue. I loved these at the start, and I want to trust them again, but at this alarming failure rate, I’m rapidly losing confidence. A disappointing experience from a brand I expected more from.

It is absolutely amazing how far LED technology has advanced in these bulbs. the color is perfect. The warm color tones are comparable to an incandescent bulb, maybe slightly cleaner. A little warmer than a Philips halogen bulb would have been. In addition the pattern of radiated light perfectly replicated that of an original incandescent bulb. We are using this bulb with a Luton electronic dimmer, the bulb responds perfectly through the brightness gradients that the dimmer provides. There are cheaper LED bulbs out there, but these are well worth the small difference. It is amazing that you can now get the brightness of a 60W bulb as a fraction of the energy usage (8w of power).