ok... first off, my background is product design, I have a bsc (hons) degree and I still work with designers on a regular basis even though I now specialise in the 3D side of things. I also say things as I see them, it's nothing personal but I don't see the point in saying something is good if it isn't.
1... been done before, just google jenga lamp
2... basic idea has been done before, it's also going to be unstable because it's top heavy
3... looks like lots of strands of hair or similar, it's kind of been done before
4... again looks fairly similar to other designs that have been done
5... assuming transparent plastic... basic idea has been done before, the shape is maybe a little different though
6... picture looks like it could be a sex toy as well as a lamp... honestly that was my first thought on that one
7... cut out lampshade, been done to death
8... not entirely sure what's going on with this,
Having said all that your concepts really need to show relevant details because that dotted outline (number 8) is for another 'unit' that sits on top where as I suspect yours is meant to be transparent sections. It doesn't help when all we get is the image on the paper with none of the text which I assume is outside of the image.
To summarise, there's nothing there that's really original and if I remember back to my college/a level/uni days originality was part of what your work was graded on. The problem with lamps is that to put it simply there's only so many ways you can do things and most have been done. In your case you either need to think outside the box, which your current ideas don't really do, think of ways of re-purposing things to become lights or moving away from the desk and working on mood lights for say the garden etc.
For example, you've now got the option of using led lighting so (idea just popped into head) you could take a balloon and stick an led light (think fishing rod tip light) inside it before blowing it up using helium (I think it's safe...) so it actually floats while it glows, you could even have it powered by electric and have the power cable act as a tether. Would work great for mood lighting, especially when a load are bunched together. Unsurprisingly a quick google for balloon lamp has a similar idea already being conceived/produced.
Another quick idea was working on refraction. Take a thick piece of transparent plastic/glass and router out (45 degree cuts) and cut out a 'lamp' or 'light bulb' shape. Shine the light in from the very bottom and the lamp will glow while the rest of the sheet (except edges obviously) remain clear. But even that isn't really new...
See what I mean about it being a hard area to really be original.