1   General / General Discussion / Re: Best Places To Look  on: Today at 04:36:57 PM 
Started by Lurry - Last post by Cole D.
I find thrift stores tend to have some interesting older stock bulbs like MV and CFL for sure. Flea markets I don’t often have a lot of luck lighting wise but I have found some neat light fixtures sometimes for good prices.

Also sometimes yard sales and estate sales, particularly the ones at older houses where the people lived there for decades, so there tends to be a lot of older stuff around, particularly barns, garages, sheds. The “boutique” like sales in snobby new neighborhoods and the yard sales with just baby toys and clothes I never find anything at, other than overpriced furniture and decorations, so I avoid those.

Although even the newer estate sales that I go to I sometimes find some cool flash lights and such.
 2   Lamps / Modern / Re: Why Osram moved from tin to rare-earths in their Excellence MH lamps?  on: Today at 12:45:43 PM 
Started by dor123 - Last post by RRK
In my experiences the objects showing most metamerism with Dy-Tl light (Cs seems not to have any meaningful output) are somewhat aged plastics, like my synth keys. These turn some unsightly especially yellow-green color.
 3   Lamps / Modern / Re: Why Osram moved from tin to rare-earths in their Excellence MH lamps?  on: Today at 12:35:57 PM 
Started by dor123 - Last post by dor123
My now broken Sylvania HSI-TD 70W/D have Dy-Tl-Cs, and there was no problem with greenish light. The light is pure white with a very slight hint of yellow.
 4   Lamps / Modern / Re: LED EOL while turned OFF!  on: Today at 12:34:17 PM 
Started by merc - Last post by marcopete87
Maybe it was the same effect like you can 'feel' electricity while brushing your finger on some electric appliances. Even my smartphone does that with some chargers - one has to slowly move their fingers on the metallic parts of the cover to feel that.
It happens also to me when i touch nearby metallic objects.
 5   Lamps / Modern / Re: Why Osram moved from tin to rare-earths in their Excellence MH lamps?  on: Today at 11:53:33 AM 
Started by dor123 - Last post by RRK
IMHO, Dy-Tl chemistry tends to turn ugly green easily, probably more in low-powered lamps, and also tends to show metamerism due to strong narrowband green peak. Even in very good lamps like 4500K Ivasaki. I have 150W /D lamp that may be original Osram, or may be imitation, with Dy+Tl+Na+ (Li? Rb?) which gives nice balanced fresh light with ~85 CRI and CCT slightly above 5000K. No green tint and no obvious flaws.
 6   General / Off-Topic / Is a steam table supposed to boiling the water?  on: Today at 07:58:31 AM 
Started by Cole D. - Last post by Cole D.
I have one of those Kenmore electric roaster/ovens and it has the cover and 3 food pans to convert to a warmer/steam table setup.

It say to heat the water at 450 until water is “very hot” but are it supposed to boil water or just have steam?

I remember I used to work serving food at the air show, and I had small warmer and the water wasn’t boiling, but had some steam when the pan was taken out.

I remember in school in lunch line, once the pan was removed from steam table and the water was boiling, while other times it wasn’t. But sometimes I’d see the pans taken out at end of lunch and huge clouds of vapor would come up.
 7   Lamps / Modern / Re: LED EOL while turned OFF!  on: Today at 07:50:30 AM 
Started by merc - Last post by dor123
My mother have a miniature LED floodlight at her balcony. Despite it is barely used, it EOLED and began to glow dim or flash (I don't remember exactly what happened). I think the floodlight EOLED when it was turned off.
 8   Lamps / Modern / Re: Why Osram moved from tin to rare-earths in their Excellence MH lamps?  on: Today at 06:55:07 AM 
Started by dor123 - Last post by dor123
And regarding to the 70W/D and 150W/D, James said me that the original halide chemistry of the /D was Dy-Tl-Cs. The Excellence moved to Dy-In-Tl-Na. Why Osram did this? while the CCT remained 5600K, this lowered the CRI significantly, and the light is much less comfortable for me compared to my Sylvania HSI-TD 70W/D, which have the original chemistry of the Osram HQI-TS 70W/D and 150W/D.
 9   General / General Discussion / Re: 1000 watt MV lamp on 1500 watt ballast?  on: Today at 06:35:28 AM 
Started by RadiantMV - Last post by RRK
The fact it was done with old American lamps surely does not mean it is a good idea to try on today's cheap Chinese stuff))
 10   General / General Discussion / Re: Best Places To Look  on: Today at 06:31:31 AM 
Started by Lurry - Last post by RRK
Local second hand listings are goldmine. A nuance is that as done by non-professionals, items are often misplaced and mis-categorized. As MH may be listed as halogens of just as 'lamps' or floodlights etc. Ballasts are often placed under very weird names, sure. So trawling by a wide category, you will find some surprises.

Electrical shops and distributors often have some old stocks to get rid of, often not listed anywhere. A visit in person can yield many surprises like induction lamps, or Philips original blacklights, or weird unusual kinds of color MH, and so on... Of course distributors do not like to sell in single pieces, but! still money is money.
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