Pretty simple

 

Purchase a 7 to 19 volt LED from Evan's design's (a forum sponsor) and simply hook one side to

track power and the other side to a ground source.

 

 

Alex

Here's more info

 

Home :: Hobby LEDs ::  Universal Solid LEDs for transformers
LEDs for AC or DC: Fully Pre-wired LEDs Ready to Connect to Model Train and Miniatures Universal AC/DC power sources
	<form action="http://order.store.yahoo.net/yhst-90003439008043/cgi-bin/wg-order?yhst-90003439008043+bl-212" id="ysw-order-form" method="post"> Order Information Availability Usually ships the next business day Item # Universal-LED Price $3.25 Size <input checked="checked" name="Size" type="radio" value="select size" /> select size <input name="Size" type="radio" value="1.8mm (T3/4)" /> 1.8mm (T3/4) <input name="Size" type="radio" value="3mm (T1)" /> 3mm (T1) <input name="Size" type="radio" value="5mm (T1 3/4)" /> 5mm (T1 3/4) Color <input checked="checked" name="Color" type="radio" value="select color" /> select color <input name="Color" type="radio" value="Warm White" /> Warm White <input name="Color" type="radio" value="Cool White" /> Cool White <input name="Color" type="radio" value="Red" /> Red <input name="Color" type="radio" value="Yellow" /> Yellow <input name="Color" type="radio" value="Orange" /> Orange <input name="Color" type="radio" value="Blue" /> Blue <input name="Color" type="radio" value="Green" /> Green <input name="Color" type="radio" value="Violet" /> Violet Wire Length <input checked="checked" name="Wire Length" type="radio" value="8 inch" /> 8 inch <input name="Wire Length" type="radio" value="14 inch(+.10)" /> 14 inch(+.10) Qty <input maxlength="3" name="vwquantity" size="3" type="text" value="1" /><input align="absmiddle" class="addtocartImg" src="http://ep.yimg.com/ay/yhst-90003439008043/color-changing-led-4.jpg" type="image" /> </form>
Choose your Size and color when ordering Save Money! * one light 3.25 5+ lights 3.00ea 10+ lights 2.80ea Related Items Flashing AC DCC LEDs Switch    Hook Up Wire * Mix&Match. Prices will update in cart as you add more lights from this page Fully Assembled LEDs for Plug and Play use Yes! You can Connect these LEDs to any track power source: these solid non-flashing LEDs will look great with 7-19 Volts of power input. Guaranteed to stay lit for 2 years with free replacement Thousands and thousands of these LEDs are now in use, on all types of track and transformer power supplies. Our LED Lights can be used for Locomotive Headlights, Passenger Car Lights, Ditch Lights, Yard Lights, Building Lights, and much more. Low heat super bright LEDs only draw a tiny amount of power: 20milliamps. Choose your colors, we have warm white, cool white, red, orange, yellow, green, blue, and violet. Deciding which white to get?

For steamers, I use evans designs surface mount leds and drill a small hoe for the wires. On the led side of the rectifier wire orientation matters so mark them ( I fold one set as a means of marking

I like incandescent lighting for the cab in some cases, it has a totally different feel to it, and it's less directional.  Of course, being the LED evangelist that I am, that may strike some as blasphemy, but what can I say.

Forum sponsor Henning's Trains selling a ready-to-go LED lighting kit for passenger cars that I think is the easiest/fastest solution to lighting an Aerotrain cab. 

 

http://store03.prostores.com/s...Passenger-Car/Detail

 

Because the Aerotrain cab is relatively long, I don't think a single bulb or LED would look right.  The above LED kit uses so-called LED strips which come in 2" sections each with 3 LEDs on it.  The LEDs are of the surface-mount style which means they are short/flat and have a wide illumination angle.  I'd mount a 2" strip on the ceiling of the cab (the strips have adhesive backing).

 

As I understand it, you can buy the LED lighting kit a la carte since obviously you don't need all the LEDs for an 18" passenger car.  Note that the board has a brightness adjustment which some/most of the off-the-shelf individual LED assemblies do not offer.  In my opinion, cab lighting requires a just-right brightness to look realistic.

 

If you are handy with a soldering iron and want to mess with component-level assembly the circuit used on the LED kit has been discussed on OGR many times.

 

One benefit of going with LED strips is there a many here on the forum who have used them and will provide you prompt and knowledgeable assistance.

 

Alex--thanks for the suggestion.   I considered the Evans LEDs but not sure how difficult it would be to install.  What type tools would I need to do it and how long should it take?

 

Stan--thanks for the Hennings suggestion.  I will go to their site and see if it is something that I can take on myself.

You're also the problem solver! There must be something that will give these LEDs an incandescent look. I was hoping kapton tape would do it, but MEH, not so much. 

I've attached the instructions for the lighting regulator module to this post, that should give you an idea of what wiring is like.  It's just track power on the input, and the LED's on the output.

 

My solution to getting closer to the incandescent look is to use either warm white or yellow LED's.  I then take sandpaper and sand the exterior to defuse the light from the LED.  It does a pretty good job, but I can't say it's truly the incandescent look.