double ended mh bulbs vs screw in type

[Samw]

Originally Posted by BrainVat

I think you're misunderstanding mine and Dr. Joshi's argument. He is saying that it is a myth that DE bulbs are always brighter than SE bulbs, whereas I am saying that it is still a good general rule for bulbs within a given brand, despite a few exceptions like that one.

He didn't use the word "always". That wouldn't make any sense. In studies like this, I've never read or heard anyone say that DE bulbs are always brighter than SE bulbs. What people normally say is that DE bulbs are generally brighter than SE bulbs. This is the myth (according to Sanjay). It is quite simple, all Sanjay is simply saying is that its a myth to think that DE bulbs are brighter than SE bulbs. IF he wanted to say "It is a myth to think that DE bulbs are always brighter", then he would have said it. But he didn't. What he is saying is that its a myth that DE bulbs are generally brighter than SE bulbs because his data shows that SE bulbs are generally brighter than their DE counterparts.

And that XM graph is not an exception. It seems to be the rule. Did you see the other 5 random graphs? They have the same results. Can you tell me again how you measure intensity? You haven't even shown 1 graph yet where the SHIELDED DE bulb of the same brand is brighter than the SE bulb. There might be 1 or 2 but they aren't easy to find. I haven't found it for 250W ballasts yet. I'm sure if I spend another 10 minutes, I might find one.