MrJay Posted August 22, 2010 Share Posted August 22, 2010 Well as the topic says it was only when I put one of my 812's next to the 518's I realised the colour difference the 518's light looks yellowish, the lamps are philips MSD200 the other odd thing is when they're first turned on the light goes it's proper shade of white with a blue tint then starts to go yellow..... So question is are the lamps needing replacing? They both still look crystal clear and were replaced not long before I got them and I haven't used them much or maybe a voltage drop issue or something else? :D Link to comment Share on other sites More sharing options...
niclights Posted August 22, 2010 Share Posted August 22, 2010 Check lamp alignment. If that's correct then try swapping between the two fixtures. Link to comment Share on other sites More sharing options...
MrJay Posted August 22, 2010 Author Share Posted August 22, 2010 I've tried aligning the lamps and both units are doing it the bit I don't understand is why they have the proper white/blue light then go yellow :D Link to comment Share on other sites More sharing options...
Panchromatic Posted August 22, 2010 Share Posted August 22, 2010 Well as the topic says it was only when I put one of my 812's next to the 518's I realised the colour difference the 518's light looks yellowish, the lamps are philips MSD200 the other odd thing is when they're first turned on the light goes it's proper shade of white with a blue tint then starts to go yellow..... So question is are the lamps needing replacing? They both still look crystal clear and were replaced not long before I got them and I haven't used them much or maybe a voltage drop issue or something else? :D Have you stripped the units down and cleaned all the internal optics are clean? also is the small uv filter over the lamp housing still there? Could it be smoke fluid on the optics somewhere? Link to comment Share on other sites More sharing options...
niclights Posted August 22, 2010 Share Posted August 22, 2010 If the lamp looks bad in both fixtures then it's a problem with the lamp. Link to comment Share on other sites More sharing options...
MrJay Posted August 22, 2010 Author Share Posted August 22, 2010 Do MSD lamps go dimmer or can the colour temperature change a lot as well? Link to comment Share on other sites More sharing options...
MrJay Posted August 23, 2010 Author Share Posted August 23, 2010 http://a.imageshack.us/img62/9035/img0052048x1536.th.jpg After looking at it again in the dark it could very well be the lamps, is it worth upgrading them to the MSD250 or just leave them as MSD200? Link to comment Share on other sites More sharing options...
ocfe Posted August 23, 2010 Share Posted August 23, 2010 Isn't the Roboscan 812 designed for 150w lamps only? Link to comment Share on other sites More sharing options...
MrJay Posted August 23, 2010 Author Share Posted August 23, 2010 Yea I was comparing the lamp colour temperature to the 518 because the light didn't look blue to me. Link to comment Share on other sites More sharing options...
KevinE Posted August 23, 2010 Share Posted August 23, 2010 Discharge lamps of any type can differ vastly in colour temperature and hue, and yes they change as they warm up and as they age. Different types do this to different degrees. If consistency is what you're after, make sure all the fixtures have the same brand, type, colour temp (often a part number suffix) and age of lamp, that the fixture has the mains voltage tapping set correctly, or get a fixture that accepts a lamp that has a guaranteed colour over the majority of its lifespan. It is not fair with disco lights like these to be too nit-picky regarding this matter! The photos youve posted show slight lamp misalignment as well, though it shouldnt affect colour significantly. Link to comment Share on other sites More sharing options...
MrJay Posted August 23, 2010 Author Share Posted August 23, 2010 Just pulled the lamp out of the other unit and found the glass bubble inside has started to deform..... replacement time I think! :) Link to comment Share on other sites More sharing options...
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