This price has not changed since 2026-09-30 16:08 UTC. It reflects the last observed trade rather than current market value, and this page is excluded from our sitemap for that reason.
Community price on backpack.tf: 10.0–12.0 keys, last changed 2019-11-15 (7.0y ago). The live quote above, 10.5 keys, is inside the community’s range and last moved 1mo ago. They are different measures: the quote is what traders and bots are asking and bidding on the classifieds right now, and it moves for thousands of items every day; the community price is a suggestion accepted by vote, which changes only when someone argues it should. A quote well away from the vote is usually a price that is about to be re-argued. Community prices from backpack.tf, read under an hour ago.
Steam Market asking price: $33.64 — the lowest of one listing for the Kill-a-Watt effect when we looked on 2026-11-03 01:25 UTC (2d ago). This is what a seller is asking, not what anything sold for. Steam pays out in Steam wallet funds, not cash, and Valve takes roughly 15% at the till — so asking prices there run well above the 10 keys, 29.77 ref shown above, which comes from the keys-and-metal market on backpack.tf. The two are different markets and are never blended. Steam lists the item as “Unusual Halogen Head Lamp”, with no effect in the name — the effect comes from the individual listing.
Price history
Interactive chart. Press the left and right arrow keys to move along the series, Home or End to jump to either end, Escape to clear.
The key axis converts at today's rate. Prices are recorded in metal, so a line that is flat in keys followed the key rate rather than standing still.
| Observed (UTC) | Sell | Buy |
|---|---|---|
| 25 SEP 2025 · 03:29 UTC | 12.2 keys | 8.32 keys |
| 19 OCT 2025 · 20:19 UTC | 11.1 keys | 8.30 keys |
| 11 DEC 2025 · 12:50 UTC | 9.41 keys | 7.08 keys |
| 4 JAN 2026 · 18:46 UTC | 9.02 keys | 7.03 keys |
| 3 FEB 2026 · 20:21 UTC | 7.90 keys | 7.00 keys |
| 23 FEB 2026 · 16:40 UTC | 7.90 keys | 7.05 keys |
| 15 MAR 2026 · 22:07 UTC | 8.01 keys | 6.33 keys |
| 22 JUN 2026 · 17:13 UTC | 9.29 keys | 8.08 keys |
| 12 JUL 2026 · 22:44 UTC | 8.92 keys | 7.75 keys |
| 29 JUL 2026 · 02:45 UTC | 10.2 keys | 8.93 keys |
| 19 AUG 2026 · 16:10 UTC | 10.5 keys | 9.11 keys |
| 23 AUG 2026 · 00:08 UTC | 10.5 keys | 9.10 keys |
| 23 AUG 2026 · 14:09 UTC | 10.5 keys | 9.11 keys |
| 24 AUG 2026 · 02:09 UTC | 10.5 keys | 9.14 keys |
| 24 AUG 2026 · 10:08 UTC | 10.5 keys | 9.16 keys |
| 24 AUG 2026 · 22:09 UTC | 10.6 keys | 9.19 keys |
| 26 AUG 2026 · 14:09 UTC | 10.6 keys | 9.24 keys |
| 30 AUG 2026 · 12:08 UTC | 10.9 keys | 9.47 keys |
| 3 SEP 2026 · 16:08 UTC | 11.0 keys | 9.56 keys |
| 10 SEP 2026 · 18:09 UTC | 10.7 keys | 9.31 keys |
| 11 SEP 2026 · 02:09 UTC | 10.7 keys | 9.33 keys |
| 11 SEP 2026 · 16:09 UTC | 10.9 keys | 9.44 keys |
| 12 SEP 2026 · 12:08 UTC | 11.1 keys | 9.63 keys |
| 14 SEP 2026 · 00:08 UTC | 11.5 keys | 10.0 keys |
| 15 SEP 2026 · 12:08 UTC | 11.8 keys | 10.3 keys |
| 17 SEP 2026 · 12:08 UTC | 12.3 keys | 10.7 keys |
| 26 SEP 2026 · 20:10 UTC | 8.89 keys | 7.73 keys |
| 30 SEP 2026 · 00:08 UTC | 10.4 keys | 9.02 keys |
| 5 OCT 2026 · 05:08 UTC | 10.6 keys | 9.26 keys |
| 9 OCT 2026 · 01:09 UTC | 9.99 keys | 8.68 keys |
| 9 OCT 2026 · 17:10 UTC | 10.5 keys | 9.13 keys |
| 10 OCT 2026 · 01:10 UTC | 10.6 keys | 9.24 keys |
| 10 OCT 2026 · 09:09 UTC | 10.8 keys | 9.35 keys |
| 10 OCT 2026 · 19:10 UTC | 10.9 keys | 9.46 keys |
| 11 OCT 2026 · 01:10 UTC | 11.0 keys | 9.53 keys |
| 11 OCT 2026 · 09:09 UTC | 11.1 keys | 9.64 keys |
| 17 OCT 2026 · 05:08 UTC | 11.7 keys | 10.2 keys |
| 18 OCT 2026 · 07:08 UTC | 11.7 keys | 10.2 keys |
| 22 OCT 2026 · 07:12 UTC | 11.7 keys | 10.4 keys |
| 23 OCT 2026 · 21:12 UTC | 11.7 keys | 10.5 keys |
Price history in numbers
111 readings since 25 Sep 2025Over the last 30 days the Kill-a-Watt Halogen Head Lamp's sell price ranged from 9.99 keys to 11.7 keys and is up 9.8% after 28 moves. Over a year it ranged from 6.38 keys to 12.3 keys (down 2.6%). Today's 11.7 keys sits in the upper third of its range: the lowest we have recorded is 6.38 keys (6 Aug 2026) and the highest 12.3 keys (17 Sep 2026). The price has moved 107 times since we began recording it — about once every 4 days.
| Window | Low | High | Change | Moves | Readings |
|---|---|---|---|---|---|
| 30 days | 9.99 keys | 11.7 keys | +9.8% | 28 | 31 |
| 90 days | 8.89 keys | 12.3 keys | +10.1% | 81 | 84 |
| a year | 6.38 keys | 12.3 keys | −2.6% | 102 | 106 |
Details
| SKU | 30041;5;u56 |
|---|---|
| Last price change | 2026-09-30 16:08 UTC |
| Key rate when recorded | 63.00 ref |
Same effect, other items
the effect across the catalogue| Item | Value | Updated |
|---|---|---|
| 1,111 keys | 12mo ago | |
| 1,100 keys | 12mo ago | |
| 1,100 keys | 12mo ago | |
| 760 keys | 1mo ago | |
| 387 keys | 1mo ago | |
| 303 keys | 1mo ago | |
| 283 keys | 1mo ago | |
| 283 keys | 1mo ago | |
| 261 keys | 1mo ago | |
| 265 keys | 1mo ago |
Other effects on the Halogen Head Lamp
same item, different effect| Item | Value | Updated |
|---|---|---|
| 1,650 keys | 12mo ago | |
| 1,300 keys | 12mo ago | |
| 568 keys | 4mo ago | |
| 450 keys | 12mo ago | |
| 225 keys | 1mo ago | |
| 205 keys | 3mo ago | |
| 202 keys | 3mo ago | |
| 203 keys | 1mo ago | |
| 205 keys | 1mo ago | |
| 160 keys | 1mo ago |
Priced similarly
across the catalogue| Item | Value | Updated |
|---|---|---|
| 10.3 keys | 1mo ago | |
| 10.2 keys | 2mo ago | |
| 10.6 keys | 1mo ago | |
| 10.5 keys | 2mo ago | |
| 10.2 keys | 1mo ago | |
| 10.5 keys | 1mo ago | |
| 10.3 keys | 1mo ago | |
| 10.6 keys | 2mo ago |