The woes of working with a homemade lightbox

As promised (okay, 4 months later - sorry!), I am here to report that finding lamps to fit those darned bulbs, which wouldn't cost the earth, was a painful process!

In the end, I settled on 3 of these beauties!

and one of these:

Ordered from The Lightworks (from one of the only suppliers I could find that confirmed the lamps were suitable for ES bulbs)at the lowest price I could find for £10.97each for the black and £19.97 for the white.

Note: The taller white lamp was ordered for behind the photobox to hover over the top for downlighting.

I gave up on finding the clip-on desk lamps because none seemed to have a big enough shade diameter or none would/could confirm.

Got 3 in total and ended up with this setup (insert picture here).

As for the pictures that resulted from the light box, they left much to be desired!!! No amount of hue/saturation editing in photoshop could get these babies light enough.

 

So, back to the drawing board. I figured there wasn't enough light.  So, I ended up ordering two more lamps to increase the brightness. Results as follows:

As you can see, they are an improvement, but when I photograph lighter coloured and white objects I still have some serious issues. You can see that the white and light pink suffer the most.

I'm not sure if I am drowning too much light now? 
Would a coloured background paper be better to bring out the object more? 
Where else can I put lamps to backlight the object?  I have such a small photobox, I fear needing to make a larger one!

All the blue, green and yellow items look pretty good for beginner's standards.  I am just not happy with the pink and white.  Looks like I'll be posting updates on this matter in the future!

For the time being, they will suffice.