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RESR 150 watt large envelope lamp

RESR 150 watt large envelope lamp

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This is an interesting lamp. My uncle (The one that gave me the photo shoot 300 watt lamp) gave me this lamp also. It is RESR 150 watt 235 - 245 volt 91 47k. I would have put in the etch but it is so blunt that the camera just doesn't pick it up. What is so interesting about this lamp is that it has this abnormally large envelope for only 150 watt lamp. Uncle tried to explain that it was so big for distributing light better trough rounded walls that act like a lense??? I don't know, can be total nonsense. Uncle used it as his desk lamp for fixing small watches. He says that this lamp is brighter than ordinary, so the lense thing may be true. I like this big envelope for such a small wattage lamp. Sadly it is burned out.If someone can explain why the envelope could be so large, please, don't hesitate to explain ;) rjluna2 I'm looking at you.

IMG_20181022_171632.jpg IMG_20181022_171656.jpg IMG_20181022_171016.jpg IMG_20181020_140905.jpg

Light Information

Light Information

Manufacturer:RESR
Lamp
Lamp Type:Incandescent
Filament/Radiator Type:double coil
Base:e27
Shape/Finish:round ball
Service Life:approx 10k hours
Electrical
Wattage:150w
Voltage:220v
Optical
Color Temperature:2700k
Physical/Production
Factory Location:Latvia, Riga
Fabrication Date:1991

File information

File information

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Filename:IMG_20181022_171016.jpg
Album name:vytautas_lamps / GLS and other misc. stuff
Keywords:Lamps
File Size:417 KB
Date added:Oct 22, 2018
Dimensions:1848 x 2464 pixels
Displayed:46 times
Date Time:2018:10:22 17:10:16
DateTime Original:2018:10:22 17:10:16
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Exposure Time:30002/1000000 sec
FNumber:f 1.8
Flash:Flash
Focal length:3.5 mm
ISO:155
Make:Blackview
Model:BV6000S
Software:MediaTek Camera Application
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migette1
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Peter


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Oct 22, 2018 at 08:42 AM Author: migette1
That is interesting such a large envelope, pity its blown, in the older days lamp sizes were larger, take a 100w bulb from the 1950s and compere with one made now....so much smaller. Whether this larger size can give out more light, I don't think so....any ideas, Robert

Interested in the history of electric lighting and incandescent in particular and neon glow lamps.

rjluna2
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Robert


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Oct 22, 2018 at 09:50 AM Author: rjluna2
Probably sold for some fixture with certain foci length. I have three different envelope shaped bulb for the same lumens rating posted at Long Life Commercial Service Bulbs.

Pretty, please no more Chinese failure.





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Oct 23, 2018 at 01:41 AM Author:
RESR did a lot of interesting incandescent bulbs.
But I doubt that this lamp is made for a special unknown installation.
The size of the bulb of the Soviet incandescent bulbs changed in accordance with the new accepted standards in the country.
This is a simple explanation. This is known.
For example, until the 60's a 150 w bulb was in a 300 w bulb. A 300 w bulb was in a 500 w flask. Etc. But in the USSR there were many factories producing incandescent lamps. It is quite admissible that not everyone could quickly rebuild their equipment. But if 1991 is not a mistake, then this is strange. At this time, the size of the bulb should be smaller for a long time.
migette1
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Peter


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Oct 23, 2018 at 03:10 AM Author: migette1
Thanks to you all some good info.

Interested in the history of electric lighting and incandescent in particular and neon glow lamps.

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