What country are these lamps made in?

If I recall, China. But it's been quite a while since I saw the box, so I will say that I believe that I am accurate to the best of my knowledge.

This is far infrared, what spectrum is it?

I believe that is a question for the manufacturer and or Amazon customer service. I don't recall that information on the box either? Google or Chrome Search App may have some data on your question if you ask and include the Wattage. I used these bulbs for the heat lamp in the chicken coop.

Are the lamps coated with silicone or something to prevent shattering?

no, the clear ones come in shatter shield. https://www.amazon.com/dp/B08WPGBTP1?ref=myi_title_dp it will be in stock 1-2 weeks.

Are these bulbs 6.5" long, or 9.1" long? The information in the listing shows contradictory data...

Just looking at my tape measure, and if I recall, the size of the bulb box and the bulb itself, 6.5 inches is the more accurate measurement. You can confirm that with Amazon Customer Service, as well.

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250 Watts R40 Red Heat Lamp Bulbs, 2 Pack

250 Watts R40 Red Heat Lamp Bulbs, 2 Pack

Product ID: 161450206

Details

Brand
BULBMASTER
Bulb Shape Size
R40
Light Type
Incandescent
Special Feature
Dimmable
Wattage
250 watts

⏳6000 hours long lifespan

🐔Infrared warmth for pets & livestock

🔥250W powerful heat output

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Description

🔥 Stay warm, stay ahead — heat that works as hard as you do!

DUAL PACK CONVENIENCE - Two bulbs ready to install, doubling your warmth and value instantly.
ENDURING 6000 HOUR LIFESPAN - Less hassle, fewer replacements—heat that lasts through seasons.
RADIANT 250 W INFRARED POWER - Delivers intense, consistent heat for ultimate comfort and utility.
WEATHER RESISTANT DURABILITY - Built tough for indoor use in humid or shower environments without compromise.
VERSATILE PET LIVESTOCK CARE - Perfect for chicken coops, pet enclosures, and specialty animal needs.

The BULBMASTER 250 Watts R40 Red Heat Lamp Bulbs (2 Pack) combine powerful 250W infrared heat with a durable 6000-hour lifespan. Designed with a medium E26 base for easy installation, these weather-resistant bulbs excel in warming bathrooms, pet areas, and specialty settings like beauty salons. Ideal for maintaining cozy environments for pets and livestock, they deliver consistent radiant heat with energy-efficient infrared technology, making them a smart, reliable choice for professionals seeking dependable warmth solutions.

Specifications

ASIN	B07VWL8D33
Accepted Voltage Frequency	100 to 120 Volts and 60 Hertz
Additional Features	Dimmable
Best Sellers Rank	#22,360 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #210 in Incandescent Bulbs
Brand Name	BULBMASTER
Bulb Base	E26 Medium
Bulb Diameter	4.92 inches
Bulb Shape Size	R40
Color	White/Red
Color Rendering Index	80
Control Method	App
Controller Type	Push Button
Customer Reviews	4.5 4.5 out of 5 stars (2,750)
Incandescent Equivalent Wattage	250 watts
Included Components	non
Indoor Outdoor Usage	Indoor
Item Dimensions W x H	1.03"W x 6.5"H
Item Type Name	Heat lamp
Light Color	Red
Light Source Operating Life	250 days
Light Source Type	Incandescent
Light Source Wattage	250 watts
Light Type	Incandescent
Manufacturer	BULBMASTER
Manufacturer Part Number	Heat Lamp
Manufacturer Warranty Description	30 days.
Material Type	Glass
Model Name	Heat Lamp
Model Number	Heat Lamp
Number of Items	1
Package Quantity	1
Power Consumption	250 watts
Power Source	Corded Electric
Shape	Reflector(R)
Specific Uses For Product	Heat Lamp
Style Name	250W/R40/RED/2PK
Theme	Heating
UPC	729798771502
Unit Count	1 Count
Voltage	120 volts
Wattage	250 watts

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TrustScore 4.5 | 7,300+ reviews

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38227CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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