Also you could turn the lights out and stick a sock under the lamp. The phosphorus left behind from the detergent fluoresces in the presence of UV light.
Post #6 by redrouteone
| Source Forum | 68kMLA |
|---|---|
| Category | Software |
| Post Date | Fri, 7 Jan 2011 - 03:22 |
| Original URL | https://68kmla.org/bb/threads/retr0bright-how-do-i-know-if-my-uv-bulb-is-working.21864/ |
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