REDU format ruling
Searchlightman

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)FLIP: Your opponent cannot Set (or flip face-down) any cards for the rest of this turn.
Rulings
- If "Searchlightman’s" Flip Effect is activated, and then later "Cyber Jar’s" Flip Effect is activated, all appropriate monsters picked-up by your opponent will have to be Special Summoned in face-up Attack Position.
- After "Searchlightman’s" effect has resolved, your opponent could not Normal Summon "Mystic Swordsman LV4" or LV6 because they have to be Normal Summoned in face-down Defense Position, which is considered a Set.
- If your opponent attacks your face-down Defense Position "Searchlightman" with "Inferno Hammer", the Flip Effect will resolve before it is sent to the GY, so the effect of "Inferno Hammer" cannot activate.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.