AL250: Brighter for 2016, this multi-function LED light is suitable for diving and other outdoor activities -- hiking, running, camping, fishing, etc., as it can be used on land or underwater. The Bigblue AL250 comes in five great color options, a lanyard, and only uses 2 AA batteries. Links for all courses - https://gs-diving.com/padi-courses/ Also check out Dive Singapore for the variety of gears we carry visit : https://www.divesingapore.sg/