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 Post subject: 100 watt bulb for dim bulb tester
PostPosted: Jan Wed 11, 2017 10:50 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 471
Location: Pasadena CA USA
I have a habit of over designing simple things. I decided to build a dim bulb tester complete with volt meter and switch selected bulbs of 7.5 to 150 watts. I went to a medium size hardware, big box, kind of store and there was not a single 100 watt bulb in the place. They had 150 watt bulbs and all the smaller ones, but no 100 watt bulbs. I seem to recall that 100 watt bulbs were going to be phased out, but then not phased out. I don't want to start a political war about should we or should we not, but can anyone tell me if 100 watt bulbs are still being made? Thanks


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Wed 11, 2017 11:03 pm 
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Location: Haledon, NJ, usa
J. Hill wrote:
I have a habit of over designing simple things. I decided to build a dim bulb tester complete with volt meter and switch selected bulbs of 7.5 to 150 watts. I went to a medium size hardware, big box, kind of store and there was not a single 100 watt bulb in the place. They had 150 watt bulbs and all the smaller ones, but no 100 watt bulbs. I seem to recall that 100 watt bulbs were going to be phased out, but then not phased out. I don't want to start a political war about should we or should we not, but can anyone tell me if 100 watt bulbs are still being made? Thanks

A 60 watt or maybe 75 will be fine.

https://antiqueradio.org/dimbulb.htm

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Thu 12, 2017 2:36 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3519
Location: Charleston, W.Va.
Yes, the standard 100w incandescents have been phased out. But it is still sometimes possible to find 100w (or 90w) bulbs on some store shelves, but not at a big-box store. You might have better luck at a local hardware store (Ace, TruValue, DoItBest, etc.)

But one thing that is not phased out is the 100w "Rough Service" incandescent bulb, designed for drop cords, portable equipment, high-vibration areas, etc.. These are classed as "specialty bulbs" (in the same category as colored/decorative/miniature bulbs, nightlight bulbs, panel lamps, Christmas tree bulbs, etc.) which were not affected by the Act of Congress. These cost somewhat more than the old standard-duty 100w bulbs, but are still legally sold in the USA.

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Thu 12, 2017 3:10 am 
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Joined: Jan Thu 07, 2016 11:39 pm
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Location: Poulsbo, WA
I found 100 Watt Incandescent light bulbs at the Dollar Store a couple weeks ago.

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Thu 12, 2017 4:41 am 
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Four-pack $3.75

https://www.1000bulbs.com/product/11401 ... Au7P8P8HAQ

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Thu 12, 2017 4:48 am 
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Joined: Jun Sat 18, 2011 3:36 am
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Location: Milton, FL 32570
We can get them a Dollartree and Fred's, Haven't checked Dollar General or Family Dollar.

jason


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Thu 12, 2017 7:10 am 
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Location: Tucson, Arizona U.S.A.
If nothing else, try yard sales and rummage sales. A good many of my spare bulbs came from these and similar sources.

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Thu 12, 2017 12:00 pm 
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J. Hill wrote:
I have a habit of over designing simple things. I decided to build a dim bulb tester complete with volt meter and switch selected bulbs of 7.5 to 150 watts.

I can't imagine why you would need 150, or even 100 watts, to service most consumer grade equipment. I think most AA5's for example only rate at 35 watts or so, so a 60 watt bulb should be sufficient.

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Thu 12, 2017 8:19 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: NW WA
Jim Mueller wrote:
If nothing else, try yard sales and rummage sales. A good many of my spare bulbs came from these and similar sources.


Thrift stores often have them too.

-Steve W.


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Fri 13, 2017 2:47 am 
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Location: Tucson, Arizona U.S.A.
And don't neglect halogen bulbs. Some of these are made to replace the old style incandescent bulbs so they screw into an Edison socket. Halogen bulbs are really just incandescent bulbs with different glass and different gas inside. They make more light for the same power so some of them are not banned. They would work fine in a dim bulb tester.

I have used a 300W bulb in parallel with a 200W bulb in parallel with other bulbs in a 4 socket dim bulb tester. By switching various combinations of bulbs into the circuit, the voltage applied to the set can start low and be gradually raised to near line voltage.

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Fri 13, 2017 4:09 pm 
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Joined: Sep Sun 08, 2013 6:34 pm
Posts: 178
Location: Lehigh Valley, Pa
Use a three way bulb... they come in different varieties... all you need is a three way socket from an old lamp and you'll have 3 wattages instantly switchable.

Jim

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Fri 13, 2017 11:45 pm 
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Joined: Apr Wed 02, 2014 1:13 am
Posts: 66
Here's a site that sales 100w Rough service bulbs 20,000 hour life !

6 bulbs are $14.95 !

The minimum order is $30.00!

--http://lightbulb.aerolights.com/--

Too rich for my blood !!

rrrrhre2s


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Sat 14, 2017 2:55 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3519
Location: Charleston, W.Va.
rrrhre2s wrote:
Here's a site that sales 100w Rough service bulbs 20,000 hour life !

6 bulbs are $14.95 !

The minimum order is $30.00!

--http://lightbulb.aerolights.com/--

Too rich for my blood !!

rrrrhre2s

Yes, too rich for my blood also considering the minimum order and cost of shipping from that particular website.

But if purchased individually from a local electric supply house at $2.50/each (thus avoiding minimum order and shipping costs), these 100watt "rough service" bulbs (130v rating, 20,000 hour life) are actually a good bargain assuming one is looking for a high-quality incandescent bulb. And if purchased in larger quantity from a local electric supply house, the unit price would be much lower.

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Last edited by Poston Drake on Jan Sat 14, 2017 3:03 am, edited 1 time in total.

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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Sat 14, 2017 3:02 am 
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Joined: Apr Sat 22, 2006 10:46 pm
Posts: 1425
Location: Waterloo, Iowa
I don't know if "rough service" bulbs are all created equal, but the regular incandescents are junk these days and don't last very long. I installed a rough service bulb on a bedside lamp and it's lasted 4 or 5 years now, I'm pleased with that kind of lifetime.


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Sat 14, 2017 3:14 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 10157
Location: Mpls, Minnesota
Rough service bulbs are made for drop cords or any place where they are subjected to shock and vibration, they usually have a thicker glass to resist breakage.

Dave


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Sat 14, 2017 4:40 am 
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Joined: Apr Sat 22, 2006 10:46 pm
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Location: Waterloo, Iowa
Right, I get all that, it's just nice to have a bulb that lasts more than a few months. They last about as long as domestic bulbs did "back in the day". Wish I remembered where I got them.


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Sat 14, 2017 3:34 pm 
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Joined: Jun Wed 08, 2011 2:33 am
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Location: Ohio 45177
Too bad you are not near here. I hoarded a bunch of them when they were closing them out. Using exactly one of them in a hall light that is only used intermittently. Generic. Brand cheap.


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Sun 15, 2017 2:07 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7083
Location: Beautiful Downtown Burbank CA
philcophanatic wrote:
Use a three way bulb... they come in different varieties... all you need is a three way socket from an old lamp and you'll have 3 wattages instantly switchable.

Jim
Exactly what I did and works great!


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 Post subject: Re: 100 watt bulb for dim bulb tester
PostPosted: Jan Sun 15, 2017 2:52 am 
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Joined: Aug Mon 29, 2011 4:08 am
Posts: 2184
Location: The High Plains, but not drifting.
Poston Drake wrote:
But one thing that is not phased out is the 100w "Rough Service" incandescent bulb, designed for drop cords, portable equipment, high-vibration areas, etc.. These are classed as "specialty bulbs" (in the same category as colored/decorative/miniature bulbs, nightlight bulbs, panel lamps, Christmas tree bulbs, etc.) which were not affected by the Act of Congress. These cost somewhat more than the old standard-duty 100w bulbs, but are still legally sold in the USA.

Yes, I have a small stash of those, for our garage door opener. Mine were made in Poland, iirc.

fifties wrote:
I can't imagine why you would need 150, or even 100 watts, to service most consumer grade equipment.

Nor can I. I nevertheless have a moderate stash of 135W and 150W incandescents, just because I can. ;)

Maybe I'll put one in the laundry room, some day.


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