What light bulb is this?

[mvno_subscriber]

First, sorry if this is in the wrong forum -- it was the closest my late evening brain could find.

I discovered this light bulb lying in a crate of old vacuum tubes. It seems to say 110v 500W, which to me seems incredibly bright. Does anyone recognize this? What would it have been used for, and how was it made?

My wife wants me to turn it into a lamp, it's quite pretty!

[Bud]

This lamp will grant you a healthy electricity bill. Just saying 

[emece67]

.

[Gyro]

It looks like a projector lamp - multiple filaments, closely spaced for good optical performance with a condenser lens.

In a projector, it would have been fan cooled. Clean the glass before you use it - dirt and fingerprints cause localised heating.

[JohnnyMalaria]

Looks like a projector bulb, similar to https://www.lightbulbs.com/product/ge-13355/?source=MicrosoftPPC-ProductAds&msclkid=eaa0cbd235b718634e2bab8851400881&utm_source=bing&utm_medium=cpc&utm_campaign=Product%20Listing%20Ads%20(LB)&utm_term=1100402329651&utm_content=All%20Products%20-%20Bid%20in%20Product%20Groups

[daniel444]

try it on an old welding   AC transformer they put out about 50v volts

you can often find them discarded

it should last longer on that voltage

[tunk]

And if you have a bench PSU, you could try 30Vdc.
If it works and it's too bright, an 18-20V laptop PSU.