lxdeptnz said:Fair enough. I realise that the colour temps are different. What I wanted to know, which I found out from a lamp supply company, was that a MSD 250 lamp is approximately equal to a 1kW parcan. Even though the colour temp of the discharge lamp is higher, so it's whiter and hence appears brighter.
Thanks
David
I’m not your supplier but recognize that the in general balance in some sense between that of a arc source 250w lamp might be similar to that of a 1Kw PAR lamp. This is balance of what light comes out in comparison to what the light looks like only. I in a Leko did not find a similarity, but than of course I have alway rallied behind the fact that a FLK lamp is not a FEL lamp where output and color temperatuer balance. The only balance is that of a FEL lamp in light loss due to a huge filament as to how the FLK becomes similar. How this relates to a 1Kw PAR lamp to a Mac 250, don’t know. I certainly consider them as opposing classes and would not consider them the same to my extent at least. Than of course I would not be attempting to use them for the same intent.
Let’s now take the FFP PAR 64 lamp in comparison to that of a MSD 250/2. The Luminous output of a GE standard FFP Narrow Spot is 12,000 Lumens at 330,000 Candle Power once it hits the reflector. The Mac 250 Krypton states 4,600 Lumens (after the lenses) at a 20.6° beam angle that is roughly similar to that of the FFP at 26x14°. The actual candlepower of this fixture as opposed to the other versions is not stated in my ready reference but should be a lot less. Still it’s possibly similar enough in some assumption of color temperature as balanced against luminous output.
If that’s what the vendor says, perhaps that’s by experience they have found comperable. Than again, perhaps as a last week washing machine sales person, they are blowing smoke up your rear. Test their assertion in seeing what that balance really looks like. It’s going to be different, but in overall effect is it similar? Can you tell the difference between a EHG and FLK or GLA lamp on stage in a 360Q fixture? Nope for the most part. Lots of leeway in lighting effectively.
Answer than is, don’t know. Appears brighter certainly, comprable? That’s for end users not me to say.