CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free A19 10W LED Bulb
CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free A19 10W LED Bulb
CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free A19 10W LED Bulb

CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free A19 10W LED Bulb

4005.40  - In Stock

Regular price $18.00 Sale

  • Available in 4000K, 5000K or 6500K
  • Completely flicker-free light output (Learn More)
  • Full spectrum, 95 CRI light quality (Learn More)
  • Compatible with global voltage input (AC90-240V/50-60Hz)
  • Conveniently screws into any standard E26 or E27 Edison socket
  • 10 Watt power consumption
  • 800 lumens - equivalent to a 60W incandescent bulb
  • Not dimmable, not suitable for enclosed fixtures
  • 25,000 hours lifetime, 3 year warranty
  • Product Overview

    Waveform Lighting's CENTRIC™ line of LED bulbs provides lighting that centers around you. CENTRIC DAYLIGHT™ LED bulbs provides light output that is free of optical flicker and a full spectrum color that approximates that of natural daylight. If you are looking for more natural daylight but are limited by geography, season or window placement, these bulbs will give you light that is both healthy and energizing.

    Flicker-free light output means that the rays of light emitted by the bulb are constant and uninterrupted, so you can rest assured knowing that the negative health effects such as headaches, fatigue and eye strain - previously associated with artificial lighting such as fluorescent lights and early LED bulbs - are eliminated.

    With a 4000K/5000K/6500K 95 CRI rating and a high R9 of 80+, the light spectrum emitted by CENTRIC DAYLIGHT™ bulbs is a full and complete spectrum that provides bright, white light that matches morning sunshine (4000K), noon sunlight (5000K) or noon daylight (6500K).


  • Product Specifications

    Specifications Overview
    Color 4000K, 5000K or 6500K
    CRI (Ra) 95+
    CRI R9 80+
    Brightness 800 lumens (60W equiv)
    Voltage AC90-240V, 50-60 Hz
    Power 10 watts
    Installation E26 or E27 (Medium Edison Screw)
    Specification sheet download   Specification Sheet 
    Specification sheet download   4000K Photometric Report
    Specification sheet download   5000K Photometric Report
    Specification sheet download   6500K Photometric Report
  • Installation

    This product is a standard A19 LED screw-in lamp designed to work in virtually all lamp fixtures, including those designed for traditional incandescent or CFL lamps.

    The lamp has an industry-standard E26 base, which is the ubiquitous, approximately 1-inch wide, screw-base.

    The lamp emits the equivalent brightness of a 60 watt incandescent bulb, but only consumes 10 watts. You may find that your lamp fixture has a warning regarding the maximum wattage permitted per socket. Use the 10 watt value, and not the 60 watt equivalency value, in confirming compatibility.

  • Pricing & Ordering Information

    Listed pricing is per one bulb (1-pack) or six bulbs (6-pack). Please see below for part numbers and corresponding specifications.

    Part Number Specification
    PN 4005.40 4000K
    PN 4005.50 5000K
    PN 4005.65 6500K
  • Shipping & Returns

    This item is in stock and typically ships within 1-3 business days. Shipping is free within the USA.

    If you're not 100% satisfied with the performance, color or quality of your product, we'll work with you to make it right.

    Simply contact us within 30 calendar days after delivery and we'll pay for return shipping (USA only) and offer you a full refund.

    See our delivery policy, returns & refunds policy and warranty policy.

Choose Your Daylight


Our CENTRIC DAYLIGHT™ bulbs are offered in a range of color temperatures. 4000K provides a warmer, softer white that matches the shade of morning sunshine. 5000K has a more balanced, noon sunlight color, while 6500K provides a crisp, high-energy light similar to what you would see from a north-facing window.

All color options provide 95 CRI, full spectrum light that very closely matches natural light.


Choose Your Daylight


Our CENTRIC DAYLIGHT™ bulbs are offered in a range of color temperatures. 4000K provides a warmer, softer white that matches the shade of morning sunshine. 5000K has a more balanced, noon sunlight color, while 6500K provides a crisp, high-energy light similar to what you would see from a north-facing window.

All color options provide 95 CRI, full spectrum light that very closely matches natural light.


Flicker-Free & Healthy


Some LED lights will produce rapid flicker or pulses that aren't immediately visible to the naked eye, which can cause headaches, nausea and eye strain. Our CENTRIC SERIES™ products include additional electrical circuitry to achieve a truly flicker-free light output that produces a comfortable and stable light level. Learn more about flicker here, or watch our video demonstration below.

Full Spectrum & 95 CRI

CENTRIC DAYLIGHT products offer true full spectrum light, as measured by the Color Rendering Index (CRI) and CRI R9 metrics. With a 95 CRI, 80+ R9 rating, our lamps offer the closest reproduction of natural light in the industry.

  • Frequently Asked Questions

    • What is the difference between 4000K, 5000K and 6500K?

      These color temperature options correspond to the various shades of natural light. 4000K is similar to the warmer and softer shade of morning sunshine. 5000K approximates the bright sun during mid-day, while 6500K is most similar to the crisp, blue color of the sky.

      The choice between these colors is completely up to you! There is no correct answer, and this is a question of preference.

      Regardless of your choice, all color options feature 95 CRI and flicker-free light output, which will provide you with all of the benefits of full-spectrum light.

      Below are some articles that go into further detail:

      Difference Between 5000K and 6500K

      An In-Depth Look at 4000K

      4 Things to Consider Before Buying 6500K Bulbs

      Still not sure? Take advantage of our 30 day free-returns policy to try out the different colors. If you don't like it, simply let us know and we'll send over a return label.

    • Should I get warm white (2700K or 3000K) bulbs instead?

      The most popular color temperature option for home and residential use is either 2700K or 3000K, commonly labeled warm white. These are the color temperatures that match the warm and inviting glow of traditional incandescent bulbs. 

      Keep in mind that the CENTRIC DAYLIGHT™ product does not feature warm white color temperatures, but daylight white colors, designed to match natural light, and not incandescent bulb colors. You will find them to be more of a true white color, providing you with light that is crisp and energizing. You may also find that they do not "mesh" well aesthetically with other warm white bulbs in your home.

      If you're looking for a bulb that produces a softer, incandescent-like glow, we would recommend our CENTRIC HOME™ product line, which offers the same 95 CRI and flicker-free performance but with warm-white color temperatures.

    • Do these bulbs emit blue light?

      Yes, they do!

      You may have read or heard about the concerns regarding the blue light hazard. Excessive blue light exposure during evening hours is certainly a concern, but blue light is an essential and important part of our daily lives, as it is extremely abundant in natural daylight (the blue sky!) and an important signal to our bodies and circadian rhythms.

      CENTRIC DAYLIGHT™ bulbs are the industry's best approximation of natural daylight (95 CRI), and therefore contain similar relative levels of blue light in the spectrum as natural light.

      You can think of these bulbs as mini suns that you can turn on and off at the flip of a switch. If you are concerned about blue light during evening hours and the potential impact on your sleep, we would not recommend using these bulbs at night when the actual sun has already set.

      During the daytime, however, these bulbs are an excellent way to supplement or substitute for natural light.

    • How many bulbs should I install in my space?

      We generally recommend using one bulb for every 40 square feet of space. Simply divide the square footage of your space by 40 to get the number of bulbs needed. For example, a 160 square foot area would require 160 divided by 40, or 4 bulbs.

      Keep in mind that daylight color temperatures generally require a higher level of brightness for comfort.

    • Are these bulbs good for visual arts, scientific or industrial applications?

      These bulbs are a great fit for many applications that require a simulation of natural daylight.

      For technical or visual arts applications that depend on visual assessment and a closer adherence to international standards such as D50 and D65, we recommend our NorthLux™ Series A19 LED lamps.

    • Are these bulbs dimmable?

      Unfortunately, these bulbs are not dimmable. This means that they cannot be used on any electrical circuit which has a dimmer installed, even if you keep the dimmer at the maximum setting at all times.

    • Do these bulbs emit any UV radiation?

      These bulbs do not emit any ultraviolet radiation. The light output covers the entire visible spectrum between 420 nanometers and 800 nanometers, but does not go below (UV-A) or above (infrared).

    • What kind of lamp fixture can this product be used in?

      These A19 bulbs have a standard screw-in base (E26 / E27), which is the same type that has been used for more than a century.

      As long as the lamp fixture is designated for an A type or A19 type, these bulbs will be compatible.

      Although these lamps have the brightness of 60 watt incandescent lamps, these lamps have an actual power draw of only 10 watts. Therefore, they can safely be used in fixtures that have a max rating of less than 60 watts.

    • What is the voltage range of these lamps? Can they be used overseas?


      The voltage range of this product is AC 90-240V and 50-60 Hz, which covers all global voltages. As such, they can safely be used internationally without any issues. The internal circuitry adjusts for the input voltage automatically, and does not affect the light output or performance of the lamp.

Customer Reviews

Based on 31 reviews
Excellent light source

I chose the 4000K bulbs for use in a bathroom. The bulbs provide a great approximation of morning sunlight and give the room a fresh appearance. The high CRI was a requirement. There is too much low CRI garbage on the market. Thanks for making a great product

Great bulb

Has no flicker.

No more migraines with an LED light

These lights are a God send!

Other LED lights easily trigger migraines for me. Now that almost all home lighting are LEDs, I can't walk down the lighting aisle at Home Depot or Lowes without getting a migraine. I worked in a building that did a green retrofit to several of the floors with LED lights and had to sit on a separate floor from the rest of my team and dial into meetings to avoid migraines. I'm hyper sensitive to most brands of CFLs but had not yet been able to find any brands of LED lights I could work with.

For years, I've been doing regular google searches for high frequency LED lights and I finally found some! I've been mixing the 4000K 60W brightness bulbs with the 2700K 40W brightness bulbs around the house and it's a cheerful morning daylight that I quite like and have not yet had a migraine. Thanks so much for making these!!

Timeous and well packed

Straightforward good service. Received what I ordered without any hitches. Did not have to deal with customer support so cannot comment on that.


I am building an off grid solar powered home in the mountains and needed energy efficient lights, but I also wanted something that would be healthier for my body since I am into alternative health. My solar batteries drain down a lot less with these energy efficient lights from Wave Lighting. As soon as I get my off grid home finished in the next month or two a woman will be staying with me who is very sensitive to electric and lighting. She also read your website and was very happy I am installing them into my home. I bought a variety of the lights at first to see which one's I would like the best. For me I like the 5000K lights the best. Since I know what I want now, I will be ordering the rest of the lights for the house from Wave Form Lighting. Their quality is so much better than you can find in the big brand lumber - hardware stores. So here is to your better health and electric savings provided by Wave Form Lighting. Bill B.

Great lights

When I installed the bulbs I noticed a big deference!

Everyone needs better lighting

As an engineer and technical producer in the broadcast and film world, I have learned to really appreciate great lighting. I can't tell you how happy I am to have found a source for my home environment that gives me a full spectrum response. And yes, I did take my light meter out and measure the color gamma curve. Trust me, make little changes in your environment for better health and happiness and you'll find it's worth the increased cost. You get what you pay for.

Flicker-Free: Good for shooting home movies...

I bought these because we often shoot slow motion movies of our cats doing tricks at home. Using a conventional LED bulb you get an annoying flash due to a synch between the frame rate of the camera and the pulse width modulation of the LED bulb driver (flashing effect). These have solved our problems and I look forward to buying more in the warmer color temperature. Color rendition (CRI) rating is getting to be more and more appreciated by the general consumer so thanks for offering these!

As promised -- Nice Quality Light

Purchased CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free A19 10W LED Bulb. Pleased. When I'm on video calls, the lighting is now more true-to-life. I don't perceive any flicker -- nice steady light.

Waveform, kindly, sent this part of my order sooner since the other lights I requested were on back-order. I appreciated the engineer who answered my questions by email, in advance. His comments helped me figure out what lights are likely to fit my need.

Works very well

While it is difficult for an end customer to verify how effective the lights are, from my research it does appear to be probably the best lights to buy for mood therapy. I got the 5000K ones and they are whiter than I expected. I’d recommend 4000K if you want warmer lights. Many household bulbs are actually 2700K which is very yellow