Thanks again, you guys.
I was specifically looking at the tiny warning light bulbs, 7mm bayonet base, single contact, BA7s, known in the manual as " Type 281 ". Using it for my shiny new titanium oil pressure sensor from Madass (Don Pender in Cebu City). Pulls about 0.2 watts, 1/10 of the stock item. 89 whole cents each, 5 different colors. https://www.superbrightleds.com/moreinf ... ifications
L.A.B. refers to the blinkers, which are BA15s (15mm) and pull 21 watts in incandescent " Type 382 " in the book, aka 1156. From what I can see, these are avail in LED pulling about 3 watts, but the stock flasher unit will not sense enough current to make them work, although a different flasher is avail to make it happen.
rivera posts a link to a BA9s LED. Guess how big these are? These are the right size for the pilot lamp in the headlight and the instrument lights. The book calls them " Type 989 ", 6 watts. I put these exact ones (positive earth, 0.6 watts) in my clocks with good results, although it was not easy to mount them. Being so flat, it's hard to push and twist; I used a screwdriver in the "slot" between the led's. Here's the link to the website for them in English: https://www.classiccarleds.co.uk/collec ... 3039613063
cyclegeezer, I'm impressed. Just reading the words "full wave rectifier" makes me feel lazy for remaining ignorant all these years...
Anyway, I'm pleased to report success (can now see that the light is on, even in bright sunlight) after swapping the wires from the OP sensor. I found a free "light meter" app called (creatively) Light / Lux Meter by Patrick Guidicelli for my iphone. There are several of these apps; 3 of them gave up after one usage and quit measuring altogether. The phone has a primitive light sensor used for the camera in the phone, and this is what the apps are using, although strictly speaking, according to this discussion http://www.candlepowerforums.com/vb/sho ... pp-results
, the apps are not really turning the phone into a lux meter.
Still, this app is measuring and reporting something, and a comparison in the dark garage showed about 3 times the output using the LED. You have to keep x-ing out the stupid video game that keeps popping up while you're busy with this app, but hey, it's free. Maybe the $1.99 version is better?
FWIW, the red LED I used is rated at about 12.6 lumens (5600 millicandelas at a 100 degree beam angle) and no, I didn't figure that out by myself: http://www.ohmslawcalculator.com/mcd-to-lumens