Sorry if I've been living under a rock here, but are banggood and dealextreme one and the same?
On their (BG) website, under LED gadgets, this comes up:
LED Gadgets
Buy LED Gadgets from dealextreme, and you can enjoy great price and satisfying customer service. LED Gadgets have rich colors, and red, green, blue three colors can mix 16.7 million different colors. Those gadget is energy saving, having low power, low driving voltage and high luminous efficiency. They also has high security with no radiation and no ultraviolet. Those colorful and practical LED Gadgets have been widely accepted and welcomed. Compared with traditional stage lamps and lanterns, LED Gadgets currently on the market have a compromising future.
The Chinese are always copying stuff, don't read too much into it.