Does tbe light have a separate switch for turning on/off tbe light?

Yes there is definitely a separate on/off switch. I'm not sure why others report there's not. I have 6 of these and every one has a power button. (I use several of them in dark venue craft shows to spotlight my work. If I had to remove batteries or unplug every time I wanted to turn off the lamp I would never buy it) The button is located on the front of the clamp underneath the Daffodil logo. There are 3 different brightness settings, just press the button once for low...twice for medium...three times for bright. The fourth time you hit the button the lamp powers off. Easy peasy. I keep one plugged in to my computer at all times (note that I've been using the same lamp for 3 years and it's still going!). I never have to unplug it to switch it off. The computer does have to be powered on, though....in order to power the lamp. Hope this clears things up :)

What is the wattage use

Input 100-240V 200mA 50-60Hz. Output 1.5V 1.0A almost the same as any Smartphone, you can use the USB charger of any Smartphone.

Does this have and on/off switch or do you have to plug in /out from the usb port each time?

Unfortunately no on-off switch on it.

What is difference between ult05b and ult05s besides the black color?? why the difference in price by 50%??

The one with 50% less is posted by unauthorized seller. We have reported Amazon for investigation. For authenticated product, buy from Daffodil US only.

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Daffodil ULT05 USB LED Reading Light Keyboard Lamp Flexible Gooseneck | 8 LED Bulbs, 80,000 Hour Lifespan, No Batteries Required, PC & Mac Compatible, USB Powered

Product ID: 432299

Details

Base Material
Aluminum
Bulb Base
E26
Finish Type
ABS+Metal
Item Weight
38 Grams
Product Dimensions
18"D x 0.6"W x

🌀Flexible gooseneck design

💡8 super bright LEDs

🔌USB powered, no batteries

$29.72

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Description

💼 Light up your hustle with precision and style!

RISK FREE PURCHASE - Backed by a full manufacturer’s warranty and a 30-day money-back guarantee—because your productivity deserves the best.
PLUG PLAY CONVENIENCE - USB-powered design means zero battery hassle—just connect to any PC or Mac and light up instantly.
SLEEK MINIMALIST DESIGN - Compact and lightweight with a modern black finish, perfect for your desk or as a stylish corporate gift.
CUSTOMIZABLE LIGHTING ANGLE - Flexible gooseneck arm lets you position the light exactly where you need it, reducing eye strain and distractions.
ILLUMINATE YOUR WORKSPACE LIKE A PRO - 8 ultra-bright LEDs deliver crisp, clear light for focused reading or late-night work sessions.

The Daffodil USB LED Light features 8 long-life LEDs providing up to 80,000 hours of bright, focused illumination. USB-powered and compatible with PC and Mac, it requires no batteries and offers a flexible gooseneck for customizable lighting angles. Its sleek black design fits perfectly on any desk, making it ideal for professionals seeking efficient, eye-friendly lighting backed by a manufacturer’s warranty and a 30-day satisfaction guarantee.

Specifications

ASIN	B00BWTYMPM
Additional Features	Adjustable Arm
Base Material	Aluminum
Best Sellers Rank	#388,280 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #85 in USB Reading Lamps #451 in Book Lights
Brand Name	Daffodil
Bulb Base	E26
Bulb Shape Size	A19
Color	Black
Connectivity Protocol	Usb
Connectivity Technology	USB
Control Method	Touch
Customer Reviews	4.2 4.2 out of 5 stars (4,893)
Efficiency	High
Finish Types	ABS+Metal
Included Components	User Manual
Indoor Outdoor Usage	Indoor
Installation Type	Freestanding
Is Product Cordless	No
Is Waterproof	false
Item Dimensions D x W x H	18"D x 0.6"W x 0.43"H
Item Weight	38 Grams
Lamp Type	Desk Lamp
Light Source Type	LED
Lighting Method	Adjustable
Manufacturer	Daffodil
Material Type	Plastic
Model Number	ULT05B
Mounting Type	Tabletop
Number of Items	1
Number of Light Sources	8
Number of Pieces	1
Power Source	Battery Powered
Recommended Uses For Product	Reading
Room Type	Bedroom
Shade Color	black
Shade Height	0.43 Inches
Shade Material	Polycarbonate
Shape	Curved
Specific Uses For Product	Reading
Style Name	Traditional
Switch Type	Push Button
UPC	600682780605
Unit Count	1.0 Count
Voltage	5 Volts
Water Resistance Level	Not Water Resistant
Wattage	1.8 watts

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$29.72

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

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TrustScore 4.5 | 7,300+ reviews

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