Types I would like to see:
1) A bright surefire or maglite type flashlight
http://www.armyproperty.com/Equipment-Info/Pictures/Flashlight-Maglite-2.jpg
2) A hand held spotlight
http://www.mackspw.com/ItemImages/Large/OPTQH100.jpg
3) A very bright underwater flashlight/spotlight
http://www.tradesparq.com/uploads/user/0000/0009/6835/product/847303/89718270038417D0838B2ABCAE7E1471.jpg
4) A small dim red light that doesn't affect vision
http://uncrate.com/p/2007/06/surefire-titan.jpg
5) And an IR flashlight for night vision
http://images.knifecenter.com/thumb/1500x1500/knifecenter/surefire/images/SFV2BKa.jpg