The difference in lower and higher Ma in light bulbs

watts equals volts times amps,so

12X .13= 1.56 watts

12X .075= .9 watts

The larger wattage will be brighter but the worry may be heat if it is up against plastic.

Dont know why you cant do an LED,shown here

www.jcstudiosinc.com/BlogShowThread?id=619

Dale H

or you just get a screw in LED 14v E10 base here: Lionel Replacement Bulbs

Why is there no way to put an LED into it?  That would be a new one on me!  I've never seen a locomotive that has an incandescent bulb that I couldn't put an LED in to replace it.

Thanks Dale for your input and Moonman thanks for the link but these bulbs won't work the bulb in my engine is mini screw base. John Bill tried to put LED in this engine awhile back and he said you would have to cut the old light base out of it no room and also there is a green plastic lens in there the light shines thru  looks like green marker lights in the front of the engine and would have to put green led's in it so i thought be easier to just put a brighter bulb in. John this engine is die-cast too.

I've done those exact configurations.  Yep, you just put in a little LED on each side for the markers and then the main headlight.  It works out great, and looks a LOT better than the bulb.  It's really not that difficult to do and the results are worth it.

Many times, I've taken to using chip LED's, they will quite literally fit anywhere, and I just use gap filling CA glue to stick them in place.

Very Carefully:-)

John if i can't find a suitable bulb for my engine would you be willing to put led's in the headlight and marker lights. Boxcar Bill said you can put led's in but not enough room to run the wire such tight fit in there. The item number on the engine is 6-31734. Thanks Jeff!!!!  

Are you talking the class lights on the locomotive or the markers on the tender?  If we're talking just the locomotive, he's what I would suggest.  I can certainly do that.  I presume you'd power the class lights from the headlight since it's always on, right?  The chip LED's are simply attached with CA glue directly to the green plastic lens inside.  I usually then give them a coat of liquid tape to keep the light just going through the lens.  The headlight just gets the 3mm LED inserted and glued.  A diode and a couple of small resistors and you're all set.

For a stock TMCC installation, we also have to put a 470 ohm load resistor directly across the headlight output, unless it's one that has the incandescent lamp in the firebox running off the headlight output to provide the load.

Sorry John it is the class lights in the front of the engine. This engine only has one light in the front. No cab light or markers on the tender or headlight on the tender and no firebox light. This engine has stock TMCC. Thanks Jeff 

Not a problem, we just add the resistor to provide the load.  The class lights are green plastic, right?  They sort of light when you have the bulb in there, but with LED's, they'll light up so you can actually see them.

Yes it is plastic John. 

If I understand the issue, you have a single bulb that by "brute force" illuminates multiple lenses?  So most of bulb's output is wasted lighting the interior walls of the engine.  If so, another common technique is to use fiber optic strands to capture light closer to the source and relay it to remote lenses with less loss.

Or a single green LED can be mounted further back (where there is more room) and this LED can feed 2 thin, flexible fiber optic strands that fit right up against the green lenses.

Mounting two LED chips directly will be a whole lot easier than fooling with fiber, and I can guarantee that it'll light those quite nicely.  The single bulb is currently on the frame, mounted on the smoke unit, and the headlight and class lights are on the boiler shell.  It's a piece of cake to do the LED's, and the parts are cheap as well.

John how much would you charge to do this led work also how would you run the wires. I know boxcar bill told me there wasn't enough room to run wires and hope you don't have to do any hacking LOL.

I sent you an email.

I received your email John.