diff --git a/src/hostdemo.rs b/src/hostdemo.rs
index f50d3e7..3cdbd82 100644
--- a/src/hostdemo.rs
+++ b/src/hostdemo.rs
@@ -519,11 +519,9 @@ pub fn run(target: &str, bind_ip: &str, secs: u64) {
                     Some(u)
                 })
                 .collect(),
-            _ => vec![
-                [0x01, 0x07, 0x34, 0x67, 0x01, 0x25],
-                [0x01, 0x07, 0x34, 0x88, 0x09, 0x00],
-                [0x08, 0x99, 0x50, 0x00, 0x26, 0xc9],
-            ],
+            // SL 式流程不预置灯具地址: 未设 HOSTDEMO_KNOWN 时从空清单开始,
+            // 灯具完全经广播 UN_MUTE + UNIQUE_BRANCH 二分发现获得。
+            _ => vec![],
         };
         let start = Instant::now();
         let mut di = 0usize;
@@ -1387,38 +1385,8 @@ pub fn run(target: &str, bind_ip: &str, secs: u64) {
     let mut qseq: u16 = 1;
     let mut fixtures: Vec<[u8; 6]> = Vec::new();
     {
-        // 4a) 先直查已知 UID 验证 RDM 代理通道 (灯具可能仍处 SL 会话留下的 MUTE 态)
-        let known: [[u8; 6]; 3] = [
-            [0x01, 0x07, 0x34, 0x67, 0x01, 0x25], // NFS1K2D DMX101
-            [0x01, 0x07, 0x34, 0x88, 0x09, 0x00], // NFM680S DMX112
-            [0x08, 0x99, 0x50, 0x00, 0x26, 0xc9], // HMKJ   DMX1-32
-        ];
-        println!("[4a] 直查已知 UID (GET DEVICE_INFO):");
-        for uid in &known {
-            tn = tn.wrapping_add(1);
-            let f = build_rdm_frame(uid, tn, qseq, 0x20, 0x0060, &[]);
-            qseq += 1;
-            sock.send_to(&f, &dst).unwrap();
-            let w = Instant::now();
-            let mut ok = false;
-            while w.elapsed() < Duration::from_millis(400) {
-                if let Ok((n, src)) = sock.recv_from(&mut buf) {
-                    if src.ip().to_string() != target { continue; }
-                    let b = &buf[..n];
-                    if let Some((false, d)) = rdm_region(b) {
-                        if d.len() >= 0x18 + 19 && d[0] == 0xCC && d[0x15..0x17] == [0x00, 0x60] {
-                            let a = u16::from_be_bytes([d[0x18 + 14], d[0x18 + 15]]);
-                            let footprint = u16::from_be_bytes([d[0x18 + 10], d[0x18 + 11]]);
-                            println!("    ★ {} → DMX地址 {} / {}通道", uid_s(uid), a, footprint);
-                            if !fixtures.contains(uid) { fixtures.push(*uid); }
-                            ok = true;
-                            break;
-                        }
-                    }
-                }
-            }
-            if !ok { println!("    {} → 无应答", uid_s(uid)); }
-        }
+            // SL 式广播发现流程: 不预知灯具地址, 全部经 UN_MUTE 广播 +
+        // UNIQUE_BRANCH 二分发现 + 逐台 MUTE 收敛 (见下)。
         // 先广播 DISC_UN_MUTE (PID=0003): 稳态下主机已把全部灯具 MUTE,
         // 被 MUTE 的灯具不应答 UNIQUE_BRANCH → 须先解除静音才能重新发现
         tn = tn.wrapping_add(1);