whats the difference between cool light, warm light and daylight????

Warm white and soft white will produce a yellow hue, close to incandescents, while bulbs labeled as cool/bright white will produce a whiter light, closer to daylight and similar to what you see in retail stores. The three primary types of color temperature for light bulbs are: Soft/warm White (2700K – 3000K), Cool/Bright White (3500K – 4100K), and Daylight (5000K – 6500K). The higher the Degrees Kelvin, the whiter the color temperature. Typically, most people prefer Warm White (WW = 3000K) bulbs for their homes.

are 20 inch led fluorescent light tubes made?

I'm not aware of a 20" bulb and a quick internet search didn't reveal any. I've found measurements misleading to an extent. You might measure your old bulb. It might actually be a 21" bulb. It seems to me that the pins are often included in, or at least partially included, in the total measurement.

Yes they are very slim. I purchased them for an under cabinet/over counter light fixture.

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KOR (Pack of 6) F13T5/CW - T5 Fluorescent 4100K Cool White - 13 Watt - 21" Super Long Life Light Bulbs

Product ID: 289272127

Details

Brand
KOR
Light Type
Fluorescent
Wattage
13 watts
Bulb Shape Size
T5 1/2
Incandescent Equivalent Wattage
13 Watts

⚡13W Power

🌟900 Lumens

💡21" Length

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VT12234

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Description

💡 Light Up Your Life with Style!

ILLUMINATE YOUR SPACE - Transform your kitchen or office with a crystal-clear glow.
VERSATILE APPLICATIONS - Perfect for under cabinet lighting, RVs, and more.
EFFORTLESS INSTALLATION - Quickly install with a simple push and twist mechanism.
SATISFACTION GUARANTEED - 100% refund or replacement for a worry-free purchase.
LONG LASTING PERFORMANCE - Enjoy up to 15,000 hours of continuous, hassle-free lighting.

The F13T5CW T5 21 Inch Under Counter Fluorescent Bulbs offer a cool white 4100K light at just 13 watts, delivering 900 lumens of brightness. This pack of 6 bulbs is designed for easy installation and boasts a lifespan of up to 15,000 hours, making it an ideal choice for enhancing your kitchen or office ambiance.

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VT12234

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Manufacturer	KOR
Manufacturer reference	K25674
Package Dimensions	54.61 x 5.41 x 5.41 cm; 363 Grams
ASIN	B00TJ6XL3Y

KOR (Pack of 6) F13T5/CW - T5 Fluorescent 4100K Cool White - 13 Watt - 21" Super Long Life Light Bulbs

Details

Details

Description

Specifications

Common Questions