is this bulb made by Satco?

I bought 6 F8T5 halophosphor long tubes for little over $1.00 each.They are made by "CH LIGHTING" using the rare earth halophosphor powder on their line of products.They advertise it as of stable quality, reliable, long life span and energy saving (8 W) It has a 3000K degree color (closer to tungsten than fluorescent) which is comfortable to eyes. A day-light tube has close to 5000K or 6000K degrees which it will be hard on my eyes. I think they are good bulbs, I am using one only at this time. However, I have a problem: after 2 months the bulb doesn't start completely at the first start and flickers a bit. I decided to turn the bulb OFF and ON again and the bulb works just fine, pleasant color and I leave it on even in the day-light. You know, living in Seattle is so dark in the winter that we are moving like zombies and you need to have some light on most of the time. I am using also an old light appliance I found in the basement 25 years ago so I don't know if this bulb has a slight issue or my old appliance/starter has an issue being old. I will test another bulb next month. But I encourage you to buy it, the price is right and I am sure it is going to work. What I like is that it doesn't create electromagnetic fields interfering with my portable radios or phone.

How is the 12" measured?

It includes the prongs and measure 11 and 7/8's. Working well for under counter lighting.

what ballast do these bulbs require?

these bulbs are 12volt for rv fixtures

Bought a ge f8t5/cw and it is literally 1/4" longer than the one that blew. anyone know which brand would be shorter?

I was unable to use these as they did not fix my fixture also. The product I bought that works in my fixture is a Sylvania bulb made for my fixture. They are a little shorter but the main thing is at the end of each bulb is a rounded rectangle. When putting in the fixture you need to rotate them and they snap in. I had some problems trying to find what worked in my fixture. I ended up going to a lighting place in my area with a sample bulb and they took care of it immeadiately.

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Description

💼 Illuminate your grind with long-lasting, cool-white clarity!

BULK PACK CONVENIENCE - Set of 6 bulbs ensures your entire office or home stays consistently bright and stylish.
POWER MEETS EFFICIENCY - 8 watts of bright, energy-smart lighting that keeps your workspace lit without the guilt.
ENDURANCE THAT OUTLASTS - 20,000 hours of reliable illumination—less hassle, fewer replacements, more productivity.
COMPACT VERSATILE DESIGN - 12-inch tubular shape fits seamlessly into modern fixtures for a sleek, clutter-free look.
PERFECT COOL WHITE AMBIANCE - 4100K color temperature delivers a clean, professional vibe that sharpens focus and mood.

The KOR Pack of 6 F8T5/CW T5 Fluorescent bulbs offer 8 watts of energy-efficient lighting with a crisp 4100K cool white color temperature. Each 12-inch bulb boasts a super long life of 20,000 hours, making them ideal for professional indoor environments seeking reliable, bright, and stylish illumination.

Specifications

Brand	KOR
Light Type	Fluorescent
Special Feature	Long Lasting
Wattage	8.00
Bulb Base	E26
Incandescent Equivalent Wattage	8 Watts
Light Color	Cool White
Voltage	120 Volts
Unit Count	6.0 Count
Color Temperature	4100 Kelvin
Number of Items	6
Brightness	480 Lumen
Shape	Tubular(T)
Material	copper
Indoor/Outdoor Usage	Indoor
Power Source	Corded Electric
Power Consumption	8 Watts
Item Package Quantity	6
Light Source Type	Fluorescent
Light Source Wattage	8 Watts
Accepted voltage frequency	100 to 120 Volts and 60 Hertz
Control Method	App
White Brightness	480 Lumens
Efficiency	High Efficiency
Manufacturer	KOR
UPC	817300020580 852662725704
Part Number	K25704
Item Weight	7.8 ounces
Package Dimensions	12.2 x 2.2 x 1.46 inches
Item model number	No Model
Is Discontinued By Manufacturer	No
Color	4100k (Cool-white)
Finish types	White
Special Features	Long Lasting
Batteries Included?	No
Batteries Required?	No
Wattage	8 Watts

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