Hello all,
This is my first post here. I have been selling light bulbs on eBay for 10 years. Some of you may have purchased from me. I sometimes did research here to price my items. So I finally joined to I can show you the cool stuff I find.

I have these 1000W diving bulbs by GE and Philips. It has some kind of rock pieces in it which I assume are to weigh the bulb down when its in the water.

Does anyone have any info on these bulbs? I haven't been able to find any information about them on the internet.

When I price my items, I would rather price high then bring it down later, than give it away for way less than it is worth. There have been many times where I kick myself after an item I list sells within 3 or 4 minutes of listing it. I work so hard to find these items.

The catalog calls that material” tungsten powder cleaner”. Those bulbs had a limited life of about 50 hours and the list price in 1971 was $72.00. To get the most light out of these bulbs, you could rotate the bulbs by hand and the tungsten powder cleaner would remove the blackening on the inside of the bulb. Blackening was caused by the evaporation  of tungsten from the filament.

The catalog calls that material” tungsten powder cleaner”. Those bulbs had a limited life of about 50 hours and the list price in 1971 was $72.00. To get the most light out of these bulbs, you could rotate the bulbs by hand and the tungsten powder cleaner would remove the blackening on the inside of the bulb. Blackening was caused by the evaporation  of tungsten from the filament.

Without even looking at a catalog, I can say this is correct. Many high power, short life specialty lamps used this cleaning method prior to the use of the halogen process. From my understanding, stage and studio lamps also used this cleaning method.

Wow that was fast! Thank you for this information.

I will continue to post the cool bulbs I find to this page.

Thanks, friends.

Welcome aboard Theseller! nice to see new people around.

Just wondering, what's your eBay username? I'm curious to know if I ever purchased anything from you.

 theseller is eBay seller idoovad ,i've bought a few things from him

I have bought stuff from him as well.

Yup, idoovad. I have a ton of bulbs I can't find on the internet. I will post some here.

Welcome aboard! This is Dave, do you remember me stopping by a while back and picked up the Westinghouse 1000w mercury lamps? Well, that's me and I am one of the administrators on the site.

Yup, idoovad. I have a ton of bulbs I can't find on the internet. I will post some here.

Dave! Of course I remember. That was probably four or five years ago. We have moved our warehouse twice since then. After your visit we started realizing how many rare bulbs we actually had.

So thanks for sparking our interest! Nice to hear from you again.

nice to Meet ya I have bought few things here and there
and I have bought last T10 Durotest power twist off from
ya recently. 

your welcome Ask question cause we have people around the globe to help out.