I personally have had a horrific experience with Deal Extreme and I would seriously discourage anyone from buying from them. I ordered my lights at the start of December (!) and they have not arrived yet, their customer services are not even answering. Here is my post off another forum to save myself repeating:
"After two months of waiting, my lights have not arrived yet, China Post have them marked as 'undelivered', Deal Extreme are not responding to any of my customer service requests, I have not been given a refund, the entire Deal Extreme forum is awash with people screaming about undelivered products and being ignored by customer services and... Deal Extreme are about to take a seven day holiday for Chinese New Year.
The deal was indeed too good to be true and the 'you get what you pay for' mantra seems to have proven itself again. I don't know if I ever will get the lights, and I wish I had just paid the £250 that Exposure want to a similarly powered light, and a) actually have a light, b) have second-to-none customer service should something go wrong."
Avoid DX like the plague I say...