Calling them bulbs puts me off - they are NOT bulbs. You plant bulbs in the garden.
They are lamps or lights or LED (Light Emitting Diodes)
+1 - Lack of product knowledge straight off the bat is a bit concerning.
I'm skeptical of all these LEDs hitting the market - especially the so called "cheap" LEDs that are absolute rubbish. I'm not saying these are, but you have to experiment until you find a supplier that has good quality LEDs.