Hello Guest,

You do not list your location, so go here, and enter your details:

http://optical-components.globalspec.com/specsearch/searchform/optical_components_optics/light_sources/lamps?SrchItem=11&frmqry=130V%20DC%20lamps&kqid=47428242

Advise your progress.

Kind Regards....

guest; any standard lamp A-19 50R30 Sylvania GE Phillip's tungsten filament

perry

I have tried using normal rough service AC bulbs but they don't last very long.

Hello Trini.Guest

1. Are you the Topic Originator "Guest"?
2. Are your lamps located in a place/position of much vibration?
3. You refer to "Medium Base" - Is that BC, ES or other type base?

Kind Regards....

1. Yes.
2. Yes ,very much so.
3. Correct!

I have engaged SATCO a bulb manufacturer and what they are saying is to use a 250VAC 100w bulb on the 130VDC system.Is this questionable?

Hello again,

If you run a 250V Lamp on 130V, you should have a much longer lamp life, but instead of getting around the amount of light for the 100Watt lamp, you will get around the light output of a 40 Watts lamp.

Have you considered anti-vibration type lampholders, I used these over 40 years ago, had to make our own, as no commercial lampholders of this nature were available.

We used spring suspension and multi-strand extremely flexible cable for the connection to the lampholders.

Have a look at: http://www.signatureltd.com/pricelist.pdf

(Go down to the "Pedestrian Crossing" and they have anti-vibration ES lampholders available.)

If your locations are extremely vibratory, it could be an alternative to wire the fittings with 12 Volt or 24 Volt circuits, and use 12 Volt or 24 Volt lamps.

Am I correct in thinking this installation is on a plane?

Perhaps multiple LED incorporated into a lamp, with an ES base, may be OK.

Advise further please.

Kind Regards....