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From personal and recent experience in my 940s with similarly large rectangular halogen reflectors, if you're going to switch to LED headlamps then the Auxito brand Q16 9004 LEDs should be considered. They're available online from their US distributor with a full two year guarantee and as well direct from China from their two online stores on Aliexpress for considerably less money with only a 30 day guarantee. There are simply no LED 9004s that are anywhere near street legal in North America. The DOT limit is 3000 lumens per bulb. The Q16s are advertised as 10,000 lumens, which is presumably per pair. I would absolutely not recommend going higher than this. For oncoming traffic they're a mildy harsh cool white (at 6,000K) and distractingly bright in our huge rectangular halogen headlight reflectors. Anything more than that should be considered blindingly bright.
According to their own advertising pictures and in my own headlight testing against a vertical wall, the Q16s are probably about as close as you're going to get to a 9004 halogen for a decent horizontal cutoff beam pattern. In my own testing, the hotspots are a little higher than the horizontal cutoff line, which they shouldn't be, so you will need to aim them a little lower than the spec to not be blinding oncoming traffic and being constantly blinked at.
Please spend a few minutes looking up how to properly align your headlamps on the Daniel Stern website.
https://www.danielsternlighting.com/tech/aim/aim.html
Daniel is a recognized automotive lighting expert and a former Volvo 240 aficionado who used to post here on the Brickboard. Be very careful with your plastic headlamp adjuster screws. They may need advance lubrication and working them back and forth carefully to keep them from breaking when trying to start turning them for adjustment.
Also, please be warned that your bulb out sensor may or may not be happy with LED headlamps. LED headlamps ramp their voltage draw up and down and have an internal fan to control maximum temperature. If this happens in an unbalanced manner left and right then it may well trigger the bulb out sensor. In one of my 940's (uses the same BIS) it has a tendency to do that, in the other so far no problem. One possible bypass is to open up the bulb sensor relay and bridge the left and right headlight outputs with a soldered jumper wire, effectively disabling the circuit.
Having said all this, you will be amazingly impressed with the light output of your 240 LED headlights, just be prepared to have people flash their lights at you from now on.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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