godboy Posted April 26, 2012 Share Posted April 26, 2012 After purchasing some replacement bulbs it seems there is a huge difference in a bulbs price and performance depending what brand you get. The replacement "NSK" brand HTI 150 bulbs are half the brightness of the ones I took out. they almost seem brown. Do I need to just give them time to sort themeselves out? I left them on for a hour or so. Would hotspotting them make a big difference? I am unclear on the exact purpose of hot spotting. Is it to get the beam to become a even light through out? Can some one please recommend good value HTI and MSD bulbs please. I have heard one of the good brand names is selling its normal full price bulbs off cheap repackaged as short life bulbs. I will find out who this roumor is about and post it later. I believe this is what we had been using before and they have been amazing. The only reason I didn't order them again is because I was working with another company on something and they had what I needed right next to me without ordering. Pete Link to comment Share on other sites More sharing options...
rossmck Posted April 26, 2012 Share Posted April 26, 2012 Personally for the HTI 150 I'd only use Osram, they do make a lower budget version branded EMH 150 which is compatible but has a higher colour temperature, it's half the price though. For the MSD 250/2 I use Philips, again not the cheapest but it works and you know they'll all be the same. At the end of the day typically you're putting these lamps into fixtures with a far higher value than the lamp itself - I don't want to risk damaging my rather expensive Mac 250 Entours just because I've tried to save £30 or so on the lamp - it could end up costing me a LOT more in the long run ;) Link to comment Share on other sites More sharing options...
timsabre Posted April 26, 2012 Share Posted April 26, 2012 Hot spotting is just aligning the lamp in the reflector to give the most even light output. The position of the arc can vary slightly between different lamps and may not be at the focal point of the reflector which will give an uneven or dim output. If you get the wrong lamp then the arc position can be way off and the output very dim. Can you compare your new lamp with the old brighter one to check the arc position is similar? Link to comment Share on other sites More sharing options...
godboy Posted April 26, 2012 Author Share Posted April 26, 2012 Can you compare your new lamp with the old brighter one to check the arc position is similar? I will do this when I go back to site next week. I only put one of the dim HTI's in so I might send the rest back and get what you guys have recommended. Link to comment Share on other sites More sharing options...
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