diff --git a/public/tide-pool-world.js b/public/tide-pool-world.js
index c265800..3099cf2 100644
--- a/public/tide-pool-world.js
+++ b/public/tide-pool-world.js
@@ -902,7 +902,7 @@ export const blockCenter = b => ({ x: X0 + (b.i + .5) * CELL, z: Z0 + (b.j + .5)
 export const blockBottom = b => BLOCK_Y0 + b.k * BLOCK;
 const groundLevel = (world, i, j) => Math.floor((world.h[j * COLS + i] - BLOCK_Y0) / BLOCK);
 const SIDES = [[1, 0], [-1, 0], [0, 1], [0, -1]];
-const MIX = { frame: .5, plate: .12, deck: .16, pod: .07, gear: .03, wheel: .04, lamp: .03, pipe: .05 };
+const MIX = { frame: .47, plate: .12, deck: .16, pod: .07, gear: .03, wheel: .06, lamp: .05, pipe: .04 };
 const bearing = b => !!b && (b.kind === 'frame' || b.kind === 'pipe' || b.kind === 'plate');
 // How much strain a part of this kind at (i, j, k) would carry: 0 on the ground, one more per cell of overhang. Infinity if it cannot stand.
 function strain(world, i, j, k, kind) {
@@ -1103,10 +1103,12 @@ function placeBlock(world, c, delay = 0) {
         // A small dwelling, above the tide, sheltered beside frames.
         v = (dry ? .6 : -2) + framesBeside * .25 - tally.pod * .1 + (below?.kind === 'deck' ? .4 : 0) - SIDES.filter(([a, e]) => at(i + a, j + e, k)?.kind === 'pod').length * .35;
       } else if (kind === 'lamp') {
-        v = k >= top && dry && !above && below?.kind !== 'lamp' ? .3 + (k - high) * .12 - tally.lamp * .7 : -3;
+        // A lamp caps a column near the top of the structure once it stands well clear of the water, where its light
+        // carries; the taller the column, the likelier.
+        v = k >= top - 1 && k - high >= 4 && !above && bearing(below) ? .7 + (k - high - 4) * .2 - tally.lamp * .6 : -3;
       } else if (kind === 'wheel') {
         // A tide wheel hangs off an outside frame, low enough for the current to turn it and charge it.
-        v = k >= low && k < high - 1 && framesBeside === 1 ? .6 - tally.wheel * .4 : -3;
+        v = k >= low && k < high - 1 && framesBeside >= 1 && framesBeside <= 2 ? .7 - tally.wheel * .35 : -3;
       } else if (kind === 'gear') {
         // Gears go where the tide runs through.
         v = k >= low && k < high && framesBeside ? .5 - tally.gear * .3 : -3;
diff --git a/public/tide-pool.js b/public/tide-pool.js
index 971c7a5..feea907 100644
--- a/public/tide-pool.js
+++ b/public/tide-pool.js
@@ -1,7 +1,7 @@
 import {
   createWorld, advanceWorld, offerObject, SPECIES, SPECIES_ORDER, CELL, COLS, ROWS, X0, Z0, X1, Z1, START_POOL, waterLevel, daylight,
   heightAt, surfaceAt, depthAt, onShelf, bodyAt, tideOf, tideRising, label, goalText, describeWorld, creatureById, MACHINES, BLOCK, BLOCK_Y0, blockKey, footAt, debrisAt, footing, stormAt,
-} from './tide-pool-world.js?v=32';
+} from './tide-pool-world.js?v=33';
 
 const root = document.querySelector('[data-tide-pool]');
 const status = document.querySelector('#tide-status');
diff --git a/src/components/tide-pool.tsx b/src/components/tide-pool.tsx
index 32a6d70..92f4923 100644
--- a/src/components/tide-pool.tsx
+++ b/src/components/tide-pool.tsx
@@ -141,7 +141,7 @@ export function TidePoolContent() {
       </details>
       {/* Lets the three.js add-ons resolve the same pinned module the page already uses. */}
       <script type="importmap" dangerouslySetInnerHTML={{ __html: JSON.stringify({ imports: { three: "/public/tide-pool-vendor/three.module.js" } }) }}/>
-      <script type="module" src="/public/tide-pool.js?v=52"></script>
+      <script type="module" src="/public/tide-pool.js?v=53"></script>
     </main>
   );
 }