PHO only uses original bulbs from OEM manufacturers (UHP, NSH, P-VIP, SHP and HS) ^^ PHO Lamp Housings are made of high temperature resistant raw materials for longer use More suitable for your machine ^^ Original bulbs last three times longer than replacement bulbs, with better brightness and more pronounced colour contrast ^^ All The bulbs are tested to full compliance with the original manufacturer's standards before they are sent out ^^ 30 Days Money Back Garrantee. 365 Days Warranty. Buy with Confidence.