Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: What power supply does this light come with?  I see some come with Korea 220v that need some adaptor, or does this already have the american 110v??
Document: I paid around 125 $ for it. Luckily i did come up with a solution. I decided to stick to my old 20 $ study lamp which i had bought 5 years ago from Walmart. I  just went to home depot and got a "CREE DAYLIGHT LED BULB" which produces the white light i need for studying and used that bulb with my old study lamp getting better results than this expensive lamp.
My home office has no overhead light anywhere near the desk. I work from home for many hours a day, and need to read printouts while looking at the computer screen. After half a dozen tries, I finally found a great desk lamp!NOTE:  This model is the pricier of two that look a lot alike made by Softech. The difference is in whether the portion with the bulbs swivels. This model swivels which is VERY important to being able to aim the light onto reading material.
From the title you can see that I really admire this lamp.It all comes to functionality, usability and aesthetics.Functionality - As written by others, lots of variations to set the proper light to the needs. Far better than any regular reading light that we are custom to. It eases the load on the eyes, as you set the brightness and color.Also, all axes are control'able to set the proper angle.Usability - Everything is easy. Really. Setting up - Easy.
I hesitated whether to spend 100+ on a desk lamp, especially that I already have a cheap but usable one...but, I'm so glad I made the investment!
Very nicely lit and the touchpad has a soft low in case you need to find it at night. It has 4 basic settingsSleep/Bedtime modeIt's a soft orange warm glow. I like to use it for the wee hours of morning when I wake up for whatever reason when the sun isn't fully out yet. It doesn't hurt my eyes like other lights do.Relaxation ModeThis is a step brighter than the sleep mode. A brighter orange/yellow if you will.
Adjustable arm and swivel headCONS:1. Lamp is tall. The arm of the lamp only adjusts in two places - at the top just below the bulb arm, and just above the controls at the base. You cannot get the bulbs of the lamp any closer than about a foot above the work surface because the arm of the lamp is very long. If this is an issue, you need to look for a shorter lamp.
As this was my first experience with LED lighting, I wasn't expecting much. To say that this was a pleasant surprise would be a gross understatement. This lamp creates the most natural, comfortable illumination I have come across. I spend a great deal of time in front of a computer and the Softech has eliminated the headaches and eyestrain that were a daily occurrence using CFL's and incandescent hardware.The touch-sensitive switches are a genuine pleasure to use. This is not a flimsy, cheaply-made product.
On top of the different modes, you can easily adjust for a higher/lower brightness on each setting A++.Extra:I really like that the power button is lit when the lamp is off so in the middle of the night I know where to clumsily touch and not just feel out my cluttered desk and drop things. There's also a USB port I can use to charge my iPhone.
I have been looking for a study light for so long, finally I found this on Amazon,Fashion look, highly recommend!
This lamp is so good that I am ordering two additional ones for gifts. Lots of different (color, mood) settings and illumination strength. Very light but stays on desk well. Looks very good (wet plastic look).
Answer: yes