It really depends on what you want. I have two bubble lights in my xbox.http://www.xboxcore.com/gallery/details.php?image_id=1864
They blink in different sequences.
They do not have a steady burn.
They put off WAY less heat because they are made from LEDs.
Do not alternate blinking sequences at all.
Puts off heat.
Heat was the main thing for me. I was putting mine right beside the power supply in my xbox. So I chose a bubble light.
Check out the rest of my pics. http://www.xboxcore.com/gallery/categories...73fb59a12fd074a
EDIT: I bought my 6.6 inch Bubble lights off Ebay for about $4. Shipping bumped it up to about $12 though.