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 USB LED Light - 8 Super Bright LED Reading Lamp - No Batteries Needed - PC & Mac Compatible (ULT05 Black)

Daffodil USB LED Light - 8 Super Bright LED Reading Lamp - No Batteries Needed - PC & Mac Compatible (ULT05 Black)

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

💡8 super bright LEDs

🔌USB powered, no batteries

🦾Flexible gooseneck for precise lighting

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Description

💡 Light up your hustle, not your energy bill!

RISK FREE UPGRADE - Backed by a full manufacturer’s warranty and a 30-day money-back guarantee—because your focus deserves the best.
PLUG PLAY CONVENIENCE - USB-powered design means no more hunting for batteries—just plug into your PC or Mac and get glowing instantly.
SLEEK MINIMALIST DESIGN - Compact, lightweight, and finished in matte black ABS+metal—blends seamlessly with any modern desk setup.
CUSTOMIZABLE LIGHTING ANGLE - Flexible gooseneck arm lets you direct light exactly where you need it, ensuring zero distractions for coworkers or roommates.
ILLUMINATE YOUR WORKSPACE LIKE A PRO - 8 ultra-bright LEDs deliver 180 lumens of crisp, white light—perfect for late-night productivity without eye strain.

The Daffodil USB LED Light features 8 long-life LEDs delivering 180 lumens of bright, white light powered via USB for effortless plug-and-play use. Its flexible gooseneck design offers precise illumination without disturbing others, making it ideal for reading or keyboard lighting. Compact and stylish with a durable ABS+metal finish, it’s compatible with PC and Mac and comes with a full warranty and 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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