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CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free T8 LED Tube Light

CENTRIC DAYLIGHT™ Full Spectrum Flicker-Free T8 LED Tube Light

PART NUMBER 4024.40.4P | In stock

Regular price $149.00 USD
Regular price Sale price $149.00 USD
Sale Sold out

  • T8 LED tube light that fits into existing 4-ft fluorescent fixtures
  • Use with existing fluorescent fixtures or our LED-ready fixtures
  • Features TriplePlay™ technology - works with both ballast and ballast-bypass fixtures
  • Available in 4000K, 5000K or 6500K
  • Completely flicker-free light output (Learn More)
  • Full spectrum, 95 CRI light quality (Learn More)
  • 18 watt power consumption to replace 32 watt fluorescent lamps
  • 50,000 hour lifetime, backed with a 5-year warranty, ETL listed for safety
  • Not dimmable

Product Description

Waveform Lighting's CENTRIC DAYLIGHT™ line of T8 LED lamps are an excellent option for improving light quality in indoor spaces. With a 95 CRI rating, these lamps offer full spectrum light quality in daylight calibrated color temperatures that match morning sunshine (4000K), noon sunlight (5000K) or noon daylight (6500K).

These lamps are completely flicker-free, which means the light is clean and smooth. If you are looking for more natural daylight but are limited by geography, season or window placement, these lamps will give you light that is both healthy and energizing.

CENTRIC DAYLIGHT™ T8 LED tube lights conveniently work in virtually all 4-ft fluorescent lamp fixtures, making installation quick and easy. The lamps' built-in TriplePlay™ technology automatically detects and adjusts to the fixture's wiring configuration, so you don't have to worry about electrical compatibility.

Product Specifications

Color Temperature Options:

  • 4000K
  • 5000K
  • 6500K

CRI (Ra): 95+
CRI R9: 80+
Brightness: 1800 lumens
Voltage: 120-240V AC, 50-60 Hz
Power: 18.0 watts
Length: 4-ft (120 cm)
Installation: G13 Medium Bi-Pin

Fixture Compatibility

The CENTRIC DAYLIGHT™ T8 LED tube is designed to directly replace 4-ft T8 fluorescent lamps (F32T8), and can be directly installed into an existing 4-ft fluorescent fixture regardless of its configuration. ReadyWire™ technology ensures that the LED lamp will work with your fixture, with or without the fluorescent ballast, and whether or not it is single or double-ended.

The best way to determine if these lamps will fit and operate in your current fixture is to confirm the specifications of the fluorescent lamp that is currently installed in your fixture.

First, determine the length of the fluorescent lamp that is currently installed. If it is 4-ft (48") in length and has a 1 inch diameter, you have a T8 4-ft fluorescent lamp, which means that our lamp is compatible. You can also look for a model number or designator on the fluorescent tube: if the code F32T8 is printed on the lamp, this is most likely a compatible fluorescent tube specification.

For most customers, we recommend simply swapping out the fluorescent lamp with our T8 LED tube, as this approach provides the easiest method. For further information and instructions on rewiring for ballast bypass, please refer to ourinstall guide / user manual.

Note on Ballast Compatibility: Our T8 lamps are designed to work with almost all T8 fluorescent ballasts. Please see here for a list of ballasts with which we have tested and confirmed compatibility. The T8 LED lamps can also be used without a ballast.

We recommend removing or bypassing T12 fluorescent ballasts for compatibility reasons.

Still unsure what type of fixture to use these lamps in? Check out our LED-ready T-8 LED fixtures here.

Pricing & Ordering Information

This product is available in packs of 4 lamps or 24 lamps.Please see below for part numbers and corresponding specifications.

PN 4024.40.4P: 4000K, 4-pack
PN 4024.50.4P: 5000K, 4-pack
PN 4024.65.4P: 6500K, 4-pack
PN 4024.40.24P: 4000K, 24-pack
PN 4024.50.24P: 5000K, 24-pack
PN 4024.65.24P: 6500K, 24-pack

Unfortunately, we are unable to accommodate requests for single or partial quantities (e.g. 2 lamps) due to pre-designed packaging for the product required to protect the lamps during shipping.

Shipping & Returns

This item is in stock and typically ships within 1-3 business days.Shipping is free within the USA for orders over $50.

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.

View full details


Our T8 LED tube lights feature ReadyWire™ technology. The lamp automatically detects the fixture's electrical connectivity, regardless of ballast and tombstone configuration.

Learn More


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.


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.

Learn More

Flicker-Free Demonstration Video

Compatible Fixtures

Frequently Asked Questions About this Product


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.

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

These lights 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.

Do these lights 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 lights should I install in my space?

We generally recommend installing 1 ft worth (450 lumens) of these linear lights for every 5 square feet of space. Simply divide the square footage of your space by 5 to get the number of bulbs needed. For example, a 80 square foot area would require 80 divided by 5, or 16 feet of linear lights. A 4-pack of our 4-ft T8 lamps would be a perfect fit for an installation location of this size.

While this may seem like a lot of brightness, do keep in mind that daylight color temperatures generally require a higher level of brightness for comfort due to a phenomenon described by the Kruithof curve.

For more guidance, we recommend checking out our lumen estimation calculator.

Are these lights dimmable?

Unfortunately, these lamps 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 lights emit any UV radiation?

These lights 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).

Do I need a separate light fixture for this product?

Yes, these lamps require a T8 4-ft fixture to operate. The fixture must either contain a ballast that is compatible with our lamps, or have the ballast removed or bypassed.

If you're still unsure about fixture and ballast compatibility, we recommend using our own LED-ready T8 fixtures.

Customer Reviews

Based on 58 reviews
Excellent Bulbs

No issues at all with installation. I have T12 fixtures so I bypassed all the ballasts and the bulbs fired up immediately. No more buzzing or flickering. Color is coherent across the bulbs; far from cheap but happy to pay more for quality.

Great quality, accurate color, and bright

In this photo on the left is a fluorescent Philips Daylight High color rendering lamp rated at CRI 90. On the right is the Waveform tube. Both are 5000K. The Philips is a great light but you can see on the ceiling reflection that it is slightly greener and not as bright as the Waveform. The Philips would be great for any average garage but I'm using my garage as an art studio so I really prefer the Waveform. The packaging was solid and it arrived ahead of schedule.

Also, I did some digging on the Waveform website and found that all the 5000K tube lights are the same. Centric, Northlux, and D50. They are the exact same bulb, just marketed differently.

Stellar Kitchen Lighting

I purchased these to replace some old fluorescent tubes in my kitchen overhead lighting, and these new LEDs make an incredible difference! Colors are genuinely more vibrant and it brings new life into my old kitchen. Just one issue is that I had to do a ballast bypass to get them working, as they didn't light up after the first install. Not a huge deal, just opt open the fixtures, take out the ballast boxes and directly connect the wires to the ceiling source. Overall, well worth the effort!

Frank Baloun

The lamps worked just as intended and it met the customers exact need. They were also delivered in a timely manner with no issues. Thank you!

Test Passed, Excellent CRI!

Bought a box of these to test against my existing fluorescent fixtures. We are a graphic arts shop so need high CRI and a lot of the LEDs on the market are not sufficient. We are redoing all the fixtures and want to get the very best bulbs so will be ordering these in bulk.

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