where are these made?

DO NOT BUY THESE. I've gone through THREE bulbs so far. On the HI power setting, they burned out after 4 hours of usage (average). Low power (100w-ish?) probably last little more than a week. These bulbs were made in China, so you get what you pay for.

anyone the the efficacy of these bulbs (lumens/watt)?

This bulb has a power of 250 watts and a brightness of 4,500 Lumens.

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Description

💡 Light up your world with power and longevity—don’t get left in the dark!

DIMMABLE ECO CONSCIOUS - Adjust your ambiance while supporting responsible recycling practices.
SLEEK DOUBLE ENDED DESIGN - Optimized 78mm T3 shape for easy installation and consistent performance.
BRILLIANT 250 W ILLUMINATION - Power your space with intense, crisp white light that commands attention.
ENDURING 2000 HOUR LIFESPAN - Keep your environment lit longer—less hassle, more productivity.
UNIVERSAL 120 V COMPATIBILITY - Seamlessly fits standard fixtures at home, office, or commercial spaces.

The CTKcom 250-Watt T3 Halogen Bulbs (5 Pack) deliver bright, white light with a robust 250W output and a reliable 2000-hour lifespan. Featuring a double-ended R7S base and 78mm length, these bulbs are compatible with standard 120V fixtures, perfect for home, office, and commercial lighting needs. Dimmable and designed for versatile indoor/outdoor use, they combine high performance with eco-friendly recycling requirements.

Specifications

Brand	CTKcom
Light Type	Halogen, Incandescent
Special Feature	Dimmable, Needs recycling
Wattage	250 watts
Bulb Shape Size	T3
Incandescent Equivalent Wattage	250 Watts
Specific Uses For Product	Lamp
Light Color	white
Voltage	120 Volts
Unit Count	5.0 Count
Number of Items	1
Brightness	250 Lumen
Shape	t3
Material	120v 250w halogen bulb halogen bulb t3 78mm Double Ended j type halogen bulb r7s 4.65 inch halogen halogen mini candelabra t3 halogen bulb 118mm t3 halogen bulb ctkcom halogen light bulbs 120 volt phillips halogen bulb Quartz glass halogen bulb
Connectivity Technology	Normal bulb
Indoor/Outdoor Usage	Outdoor
Controller Type	Push Button
Power Source	Corded Electric
Color Rendering Index	80
Power Consumption	250 Watts
Item Package Quantity	1
Light Source Type	Halogen
Item Weight	0.09 Pounds
Light Source Wattage	250 Watts
Accepted voltage frequency	100 to 120 Volts and 60 Hertz
Control Method	App
Average Life	2000 Hours
White Brightness	250 Lumens
Efficiency	Low Efficiency
Manufacturer	CTKcom
UPC	798216385539
Part Number	CTK098-250
Item Weight	1.45 ounces
Package Dimensions	5 x 3.94 x 0.79 inches
Item model number	CTK098-250
Is Discontinued By Manufacturer	No
Special Features	Dimmable, Needs recycling
Batteries Included?	No
Batteries Required?	No
Wattage	250 Watts