They seem to be pretty good. Focal spot was straight ahead. With the diffuser on it, there was a nice even very usable light source. My "D" batteries will now have a 'they've been used up but still have power' purpose. I had planned on buying some from a place I've ordered from (superbrightleds.com) (usual disclaimer) and been very happy with. I wasn't sure I wanted to risk it and the shipping meant just getting the bulb was going to be 10 dollars (5+5 for shipping). Local.... good price.... I gives off a really good amount of light. All in all..... bit hit with us.