Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Where is the on/off switch located?  I want to mount the lights in a bookcase, but need to make sure the switch is not on the cord.
Document: I was pleased with the quality of the lights and stands. Everything moves smoothly and locks in place easily. I like the on/off switch. Lots of use of plastic but I expected that for what I consider light home studio use. You need to be careful not to tip it over -- especially since the bulbs protrude past the shades. Aside from that it is quite stable and stands firmly. So inspite of this I'm pleased with the purchase.
Had a problem with one light that had a bad cord/switch and the sent a new one out without any hassle
So will have to be very careful of that. If Not ill look into using the small Halogen Flood PAR20 , which I think come in 50 watt  and I might be able to install a Par30  , unfortunately I do not see a UL listing on the socket or reflector . The switch is UL listed for 3 amps  120  125 VL . BTW the Ceramic Socket looks to be of  , very good Construction. Socket has markings but I cannot make them out threw the Vent holes of the Reflector .
Well packaged. Easy Assembly. Work as described but... one of the bulbs failed after about 20 hours of use. The bulbs  are supposed to last 7000+ hours... and Amazon's return / replacement policy is not &#34;easy&#34; since it appears they want the whole light set returned [and I need it for my work]. Fortunately I had ordered a four pack of additional 5500K bulbs from Cowboy Studio which have worked as described .
So I can't get the wing nuts I need. Wouldn't  you think that they could check THEIR records and see that they actually did send me the lamps that I ordered instead of having me provide all kinds of superfluous information that I didn't keep track of and therefore can't provide. They wanted pictures, receipt numbers, blah blah blah. Just send me the $.15 item and make it right! Who would try to scam that kind of thing? Just make right what wasn't right when you shipped it to me.
They fall over easily as the bulbs are large and tend to make them top-heavy. However, they're not dangerous or a problem and generally do not have issues with falling over or tipping.We will definitely buy these again when the need arises.
it does the job. Each part is independently packed, easy to instal. A few things need to be aware of.First, the cups are not as deep as shown in the picture, as a result, the light tube sticks out and you just can not stop yourself looking into the bright bulb.Second, the power cord is not as long as shown in the picture.Third, the tripod legs a apparently shorter than shown in the pic.
These are well built table top product lights. My one observation is that the bulbs are not protected and, if they slide off the table when a dog catches the cord in his tail (for example...) the bulb will break. On my third bulb, lesson learned. I store the bulbs in the supplied packaging now.
I understand returns are problematic and some people will abuse it. However, I like the product and just want a replacement bulb. The lights are well made and function as advertised. The bulbs are cheaply made Chinese bulbs and the quality is suspect. One bulb works fine so far.
I am very satisfied with the construction of these lights. Plus I can utilize wattage bulb I want to since I can change the bulbs. With the Cowboy studio set (Lightbox and bulbs) I couldn't get the small bulbs out let alone change them after they stopped working within a few days. This set is much more functional.
Answer: It's on the cord.