Tangential, I've been playing with the free table lamp by Moin3D....

https://www.renderosity.com/freestuff/items/89674/simple-table-lamp-01

Rather than tediously import/export via DS' migraine-inducing UI, I ripped the DSF to OBJ with ($$) DSF Toolkit. After editing the output 'one-material' OBJ with Wordpad, I imported to Poser. Rather than my usual 'super-ambience' work-around to light the filaments, I hunted through 'advanced' material properties. Daringly adding a physical surface node, I woke the Emission. Surprisingly, this 'topped out' much, much dimmer than I'd expected. Cranking the 'EmissionStrength' up to silly numbers (>70k) gave no further gain. And still not bright enough for shadows...

This is so different to 'super-ambient', or  even Poser's lights, which latter may be dialled to 'Dazzle'...

Have I missed something such as a limit setting ? Or is 'Physical Surface' simply the wrong route ??