by now you have probably seen the double d shaped lamp at the home improvement stores. Be careful - most of them are 50+ watts (55 is common). Because the dewalt area light is designed to be ac or battery powered, they went with a 38 watt lamp. YOU MUST USE THEIR LAMP ASSEMBLY when relamping. and this is the right one.
Other than that - it's great that you can get it here on amazon!
Enjoy