4000K Cool White LED Tube Manufacturer — Most Popular CCT
The most specified commercial CCT. Cornea Lighting's 4000K LED tubes cover T8 (9W–22W) and T5 (14W–20W) — DLC QPL, UL/ETL, Energy Star certified. Neutral white light for offices, schools, and healthcare.
📋 Quick Answer
4000K LED tubes produce cool white light with a color temperature of 4000 Kelvin — the most popular CCT for commercial lighting. Cornea Lighting manufactures 4000K LED tubes in T8 (9W, 15W, 18W, 22W) and T5 (14W, 20W) formats, delivering 1,100 to 2,800 lumens. The neutral white color temperature (4000K) is the global standard for offices, schools, healthcare, and retail environments. Multiple variants carry DLC QPL, UL, ETL, and Energy Star certification.
Available 4000K Cool White Models
| SKU | Type | Length | Wattage | Lumens | CCT | CRI | Install Type | IP | Dimmable | Certifications |
|---|---|---|---|---|---|---|---|---|---|---|
| CL-T8-4F-9W-40-A | T8 | 4ft | 9W | 1,100lm | 4000K | CRI 80 | Type A | IP20 | — | ULDLCCERoHS |
| CL-T8-4F-15W-40-A | T8 | 4ft | 15W | 1,800lm | 4000K | CRI 80 | Type A | IP20 | — | ULDLCCERoHS |
| CL-T8-4F-18W-40-B | T8 | 4ft | 18W | 2,300lm | 4000K | CRI 80 | Type B | IP20 | ✅ 0-10V | ULETLDLCCERoHSEnergy Star |
| CL-T8-4F-18W-40-AB | T8 | 4ft | 18W | 2,250lm | 4000K | CRI 80 | Type A+B | IP20 | — | ULDLCCERoHS |
| CL-T8-4F-22W-40-B | T8 | 4ft | 22W | 2,800lm | 4000K | CRI 80 | Type B | IP20 | ✅ 0-10V | ULDLCCERoHS |
| CL-T8-4F-18W-40-B-90 | T8 | 4ft | 18W | 2,100lm | 4000K | CRI 90 | Type B | IP20 | ✅ 0-10V | ULDLCCERoHS |
| CL-T8-2F-9W-40-B | T8 | 2ft | 9W | 1,050lm | 4000K | CRI 80 | Type B | IP20 | — | ULCERoHS |
| CL-T5-4F-20W-40-B | T5 | 4ft | 20W | 2,200lm | 4000K | CRI 80 | Type B | IP20 | ✅ 0-10V | CERoHSTUV |
| CL-T5-3F-14W-40-B | T5 | 3ft | 14W | 1,500lm | 4000K | CRI 80 | Type B | IP20 | — | CERoHS |
| CL-T5HO-4F-28W-40-B | T5 HO | 4ft | 28W | 3,100lm | 4000K | CRI 80 | Type B | IP20 | ✅ 0-10V | CERoHSTUV |
*Annual energy cost calculated at $0.10/kWh, 10 hrs/day, 365 days/year.
Why Choose 4000K Cool White?
Global Commercial Standard
4000K is the most specified CCT for commercial lighting worldwide — offices, schools, healthcare, and retail. Neutral white light improves concentration, productivity, and visual comfort.
Widest Certification Coverage
More 4000K variants carry DLC QPL, UL, ETL, and Energy Star certification than any other CCT — maximizing rebate eligibility and specification compliance.
Optimal Visual Comfort
4000K neutral white reduces eye strain compared to cooler 5000K or warmer 3000K light, making it the preferred choice for task-intensive environments.
T8 and T5 Formats
Available in both T8 (G13 base) and T5 (G5 base) formats — covering the widest range of commercial fixture types.
Typical Applications
4000K Cool White LED vs Fluorescent: Side-by-Side Comparison
| Specification | Fluorescent | Cornea LED (4000K Cool White) |
|---|---|---|
| Color Temp | 4100K (F32T8/841) | 4000K |
| Wattage (18W) | 32W | 18W |
| Lumens (18W) | 2,950lm | 2,300lm |
| CRI | 85 | 80 (90 available) |
| Lifespan | 20,000 hrs | 50,000 hrs |
| Annual Energy Cost* | $14.02/yr | $7.88/yr |
Certifications & Compliance
DLC QPL
Multiple 4000K variants on DLC QPL — qualifies for US/Canada utility rebates.
Energy Star
Energy Star certified on 18W 4000K Type B — qualifies for additional rebate programs.
UL / ETL
Both UL and ETL certifications available across 4000K variants.
CRI 90 Available
18W 4000K CRI 90 variant for retail and healthcare color-critical applications.
Frequently Asked Questions
QWhat does 4000K mean for LED tubes?
4000K refers to the color temperature of 4000 Kelvin — producing neutral cool white light. It is the most popular CCT for commercial lighting globally, used in offices, schools, healthcare, and retail. Cornea Lighting offers 4000K in T8 (9W–22W) and T5 (14W–20W) formats with DLC QPL, UL, ETL, and Energy Star certifications.
QIs 4000K or 5000K better for offices?
4000K is generally preferred for offices — it provides neutral white light that reduces eye strain and improves concentration without the harsh, clinical feel of 5000K. 5000K is better for warehouses and industrial environments where maximum visual acuity is needed. For healthcare and retail, CRI 90 at 4000K is the optimal choice.
QWhat is the CRI 90 4000K LED tube used for?
The 18W 4000K CRI 90 T8 LED tube is designed for retail display, healthcare examination rooms, and food service applications where accurate color rendering is critical. CRI 90 ensures merchandise colors appear natural and vibrant, improving customer perception.
QAre 4000K LED tubes available in T5 format?
Yes. Cornea Lighting offers 4000K T5 LED tubes in 3ft (14W, 1,500lm) and 4ft (20W, 2,200lm) formats with CE/RoHS certification. T5 HO (28W) is also available in 4000K.
Related Product Specifications
Ready to Source 4000K Cool White LED Tubes?
Factory-direct from Zhongshan, China. MOQ 100 pcs. OEM & private label available. DLC QPL, UL, ETL, CE certified. 5-year warranty.
📧 [email protected] · 📍 Zhongshan, Guangdong, China