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Sylvania-made F15T8 Vita-Lite

Sylvania-made F15T8 Vita-Lite

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After the GE daylight from Indonesia I was using in my desk lamp went mercury starved after 5000 hours of faithful service, I decided I wanted to try a 5000k lamp. Don93s generously sent me three of these, and I know he's sent some of these to a few others here, as well.

These are rebranded Sylvania Design 50's. These are absolutely gorgeous lamps with excellent color rendering properties. I've never seen halophosphate 5000k lamps before; only triphosphor ones. To the eye these look just slightly bluer than linear triphosphor lamps, but about the same as my TCP 5000k CFLs. I can see quite a difference from the daylight lamp I was originally using, though. These are more of a paper white color rather than blueish, and there is a massive improvement in color rendering. Food likes it should under these, rather than dull and sickly looking under the daylight lamp.

I was worried that the increased flicker these have due to the phosphor having no afterglow would bother me, but luckily I don't actually notice it at all.

Interestingly, all of the lamps in the batch Don got had some sort of glitch in manufacturing, which makes them difficult to start on preheat when new. The three I have actually didn't give much trouble at first, but after a few hours of running, the one I put into service became very troublesome - I've sometimes spent several minutes making repeated attempts to start it. It's slowly getting better, though.

Another big thanks to Don for these; I really appreciate it. I figure three of these should do me at least 10 or 15 years of full-time service. My work/dining table is the nicest-looking area of my apartment, now. :P

DSC01355.JPG MVC-088F.JPG IMG_5552.JPG Westinghouse_F6T5-CW_from_TheUniversalDave1.JPG

Light Information

Light Information

Manufacturer:Sylvania
Model Reference:15WT8 Vita-Lite (rebranded Design 50)
Lamp
Lamp Type:F15T8
Service Life:8000 hours
Optical
Lumen Output:590
Color Temperature:5000k
Color Rendering Index:90
Physical/Production
Factory Location:USA
Fabrication Date:1999

File information

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Album name:themaritimegirl / Fluorescent lamps
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Date added:Feb 16, 2016
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ace100w120v
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Feb 16, 2016 at 10:25 PM Author: ace100w120v
Don seems like a great guy!
good223
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Feb 17, 2016 at 01:55 AM Author: good223
Are you using them on manual preheat?

I wonder how the are on starters.
themaritimegirl
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Feb 17, 2016 at 04:44 AM Author: themaritimegirl
Yes, manual preheat. It's no better on starters until they break in, although a starter does save having to manually preheat it many times.

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Powell
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Feb 17, 2016 at 08:40 AM Author: Powell
There was a person on eBay selling these by the case. All of mine have been hard to start. I start off by running the first time on a trigger start fixture. You should see the shimmering at first.

NNNN!

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Down with lamp bans!


GoL the.baus.of.all.bauses UCDl2EWWZc9h1IZXcfGU9OZA nicksfans
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Feb 17, 2016 at 12:34 PM Author: nicksfans
I have one of these that I got from Powell. Mine was hard to start the first time but has been fine otherwise.

I like my lamps thick, my ballasts heavy, and my fixtures tough.

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Powell
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Feb 17, 2016 at 12:56 PM Author: Powell
I think my whole case was like that.

I wanted some Design 50s and the place that has Sylvania said I had to order a case, and when these "Fake Vitalites" came out I got that case instead. A LOT cheaper !

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good223
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Feb 17, 2016 at 02:36 PM Author: good223
Any idea what makes them hard to start but only at the beginning?

I would think the arc voltage is higher but it eventually drops
nicksfans
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Down with lamp bans!


GoL the.baus.of.all.bauses UCDl2EWWZc9h1IZXcfGU9OZA nicksfans
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Feb 17, 2016 at 02:37 PM Author: nicksfans
It may be the arc voltage, or there may be some kind of impurities in the emitter that get burned off after a while.

I like my lamps thick, my ballasts heavy, and my fixtures tough.

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don93s
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Feb 17, 2016 at 04:24 PM Author: don93s
I probably got mine from the same seller Powell was referring to. I think it was like 20 bucks a case of 24 and reasonable shipping. I've had some going in a desk lamp, a small 2x15w shop light, and even the vending machine at work. One finally went eol in the vending machine after going a few years 24/7. They don't seem to darken too much either as they age.

I also have a few of the Sylvania made 40w version which are also impressively well made. Though they started up much easier out of the box, lol.
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Feb 18, 2016 at 09:25 AM Author: Powell
I have one that has actually end banded….. unusual for Sylvania !

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ace100w120v
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Nov 06, 2016 at 04:24 PM Author: ace100w120v
I really like the Design 50 myself, a good lamp with a nice color. I wouldn't describe it as paper white, but it sure is compared to daylight. It's a nice, peaceful-feeling bluish-green compared to the pink-purple of GE Chroma 50, which also really makes colors pop.

For daylight lamps that make colors look like they should, try the current-issue Philips Daylight Deluxe. (6500K, 90 CRI). They're readily available at Home Depot, at least in the US (Trent, I know you're in Canada). I would definitely describe it as a 6500K version of something like Design 50. Not terribly bright, but renders colors quite well. Light color might be too arctic-blue for some people, but I like it. (I've heard people say Sylvania's Daylight Deluxe is too greenish for their taste). I'd describe this Philips /DX as pretty much what the overcast sky on a snowy day looks like, as far as how it looks on white surfaces.
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Aug 19, 2018 at 11:33 AM Author: themaritimegirl
Figure I'd post an update: I'm still on the first one of these lamps. It's done about 15000 hours, and there is absolutely no blackening. It gets turned on in the morning and turned off when I go to bed.

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Aug 19, 2018 at 11:41 AM Author: Cal
I've not seen 5000K (knowingly) in the flesh but I imagine it's a nice sweet spot between the yellow tinted whites and daylight being blue tinted. I like how you described it as "paper white". You've done well to put that many hours on it since you got it, I guess it must really be a "daily driver" for you.
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