Several AN/TVS 3's were sent to Vietnam for testing. According to Army reports that are now declassified, AN/TVS 3's were aimed up into the night skies over operational areas and they provided illumination sufficient to read a newspaper 20 - 30 kilometers away.
20 kW/6 on ca 3,33 kW LED-lampe. Kleebi võimsad LED-id parabooli sisepinnale ja peaaegu sarnase asja saad (?) Jahutus peab muidugi olema, Kolme triikraua jagu soojust on ikka päris palju....
EDIT: parabooli asemel siiski vaja mingit muud kuju, küll mitte päris lamedat plaati (tükike sfäärist, mille raadiuseks on fookuskaugus?) Mõtiskledes sattusin selliste asjade otsa:
https://en.wikipedia.org/wiki/Hyperbolo ... structures
Hyperboloid structures are superior in stability towards outside forces compared with "straight" buildings, but have shapes often creating large amounts of unusable volume (low space efficiency) and therefore are more commonly used in purpose-driven structures, such as water towers (to support a large mass), cooling towers, and aesthetic features.[3]
With cooling towers, a hyperbolic structure is preferred. At the bottom, the widening of the tower provides a large area for installation of fill to promote thin film evaporative cooling of the circulated water. As the water first evaporates and rises, the narrowing effect helps accelerate the laminar flow, and then as it widens out, contact between the heated air and atmospheric air supports turbulent mixing.
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Nojah, sotsid .........