I received my 2 bulbs (not seen the price of hesitation) Monday for having ordered Wednesday so this is the minimum time specified in the order. I install the bulb in 5 minutes because he just press the button (a small black rectangle located above the HDMI plugs on my Epson TW3200)), where the lid opens revealing the lamp frame with 2 small Phillips screws ... Once I replaced the lamp illuminates the projector non unhurried and 20 - 25s the image appears gradually and then I am very pleasantly surprised this beautiful light, these beautiful colors the tired old bulb could not provide. The bulb costs 5 times cheaper than the original for an equivalent quality, now it remains to verify the lifetime ... for my Epson 1700 hours bulb.