Older SAG, case studies and everything rated the full RE80 line Philips fluorescent lamps at CRI of 86.
Now, everything has been downgraded to 85, and 850 and 865 are downgraded to CRI 82.
Long Life Universal 32W
850 was 86, 2950 new, 2800 mean
865 was 86 2850 new, 2710 mean
eight years later, they perform poorer right out of the box
2009, they're called Plus 800 series Long Life
850 is 82, 2850 new, 2710 mean
865 is 82, 2750 new, 2610 mean
Did Philips degrade the phosphor blend performance or were they over-rated in the past?
Whether it be Philips or the competition or even the DOE, it is well known that the lumens drop as we go to higher CCT. It is true that over the years Philips has changed phosphor blends to give the customer the best overall product based on color quality, low mercury, long life, and performance. If we specifically look at the PLUS T8 lamps we should note that while indeed we lost a few CRI points (86 moved to 82), we gained dramatically in lifetime versus the product of 2001. In the end, it is the view from Philips that the distinction of 4 CRI points is much less relevant to the end user who will now see increased savings on overall maintenance costs for their facilities.
The current 865 will not pass the new DOE standards. The old one would have.
By your argument, if 100 lumens or so and 4 points in CRI isn't important, then the performance difference between 850 available today and 750 from 10 years ago is insigificant.
32W 750 from 2001 was 78 CRI with 2750
32W 850 today is 82 CRI and 2850
If 100 lumens is insigificant, why do you offer an entire product line called the Advantage T8 High-Lumen 3100 lamps with the only product differentiation being 150 lumens more than the regular standard series? (for the 850, its only 75 lumens more than 850 from 2001
In the end we let the market drive our decisions as an organization. Philips is not saying that 4 CRI points/100 Lumens is insignificant, we simply choose to address our customer needs in a way that gives us greater sustainable flexibility. In regards specifically to color 865 we recognize that this is an issue for meeting DOE 2012 and are actively working to enhance the design that will allow us to increase the efficiency on this lamp thus meeting the higher standards for the 2012 legislation. Thanks for your intuitive questions and interest in Philips products.