I don’t know if this be merely highly fortuitous or highly lucky; in any case, however, I think I might have a
perfect* solution.
I hope that this sincerely help all concerned, as I, too, have been looking for something such as this. In my research, I found that LEDs don’t make good replacements as they radiate light in a different manner than the filament of a halogen bulb, causing blinding glare to other drivers, even when using the dipped beam. I read Daniel Sterns** page on lighting [see below] and read atop that. I Even asked him for a recommendation for a headlight, and he advised for the
Philips sealed-beam unit (which basically looks like the same
TruckLite unit one can also buy). This left me, as I’m sure it did the rest of you—all of us—scrounging through the straw searching for the proverbial needle. I
strongly feel that
Deltarider is right to suspect that the
Osram LEDs are promising, and they may indeed be just the solution for which we all are looking.
Just yesterday I found out about those very bulbs; and, as it turns out, they are tested and approved for road-use in many right-hand traffic (left-hand drive) countries across Europe! They test them in the laboratory paired with different headlamps and see if the combination thereof pass the ECE R112 regulation (the European equivalent to FMVSS 108). They list, for each country accepting the
Osram LED headlight bulbs, a full table of lamps and bulbs laboratory tested theremid, for truck, car, and motorcycle.
Now, as luck would have it, the
Koito 7” round lamps not only fit perfectly, but they
Also are certified as compatible with the
Osram road-legal LEDs! The lamps are some of—if not The—best performing lamps in terms of light spread and beam pattern, according to Daniel Stern; and, according to him, they surpass the old
Cibié headlamps. They have fluted glass and are a perfect fit to our SOHC4s. I looked up the code on mine and confirmed just now that it indeed is tested and approved to be used on continental European roadways, without blinding glare. They can be had for quite cheap straight from Toyota, too [see the linked forum thread below on the cheap
Koito lamps wherein links to suppliers from which to purchase them can be found].
Not Only That, however:
Osram makes an H4 LED headlight with a kelvin rating of 2700 that was designed to mimic perfectly the appearance of a halogen bulb. I am, as of submitting this post, going to be ordering some bulbs from a parts supplier in the Netherlands [linked below].
In short: this can be an easy way to get precisely that which
Mr.D stated he wanted—a brighter (semi-)sealed lamp housing which together with its LED bulb is both brighter than stock and yet unblinding to other drivers whilst at the same time maintaining a pefrcet look or originality; all of which—in mine estimation—these bulbs and lamps
strongly do.
Once I have them and everything all set up, if anyone should want, then i can report back on here my personal opinions on the lights, as well as how I felt they performed.
*subjective opinion aside
**a professional lighting consultant:
https://www.danielsternlighting.com/about/about.html References:
Daniel Stern about lights other than halogen:
https://www.danielsternlighting.com/tech/bulbs/Hid/conversions/conversions.html The Philips LED Headlamp:
https://www.usa.philips.com/c-e/au/car-lights/led-interior-and-exterior-lighting/led-integral-beam Compatibility Lists for Vehicles & Countries:
https://www.osram.com/nb-led Forum Thread on Cheap Koito Lamps:
http://forums.sohc4.net/index.php/topic,204735.msg2310339/ The Osram Bulbs:
https://retrofitlab.com/products/osram-ledriving-r-hl-vintage-h4-h19-r2-warm-white-halogen-look-led-2-700-k?_pos=1&_sid=ca057c3cf&_ss=r 
