Ah sorry for the late response. I wonder how much the wattage factors into the strength across the distance. I was looking at the sensor you bought but I saw some reviews that were questioning its efficacy. I don't know enough about how the sensors work yet but I can learn. I was noticing the best bulb you had was a 36W bulb, the lamp I am using is 55W, so very curious how much more effective it is if not negligible https://www.amazon.com/gp/product/B06XYJN9M9/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

I would like to buy a sensor to test the UV lights that I have an see their efficacy. The small chamber I made around my entry-bathroom is about 13 sq feet (10 feet high though). I put the lamp on top of a tall box in the middle of the space

The hand-held UV-wand I use is from Petoneer https://youtu.be/XwxMrJ4cRKg which has specialized in this and is the only one that allowed small area sanitizing (if you take off the helmet) or directed sanitizing (in any direction you aim it, unlike the ones that shut off if you aim them in any other direction than down).https://www.ebay.com/itm/Outdoor-UV-Lamp-Wand-Sport-Water-Filter-Bottle-BPA-Free-4Stage-for-Travel-Hiking/353111016065?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649Price fluctuates and so does their deal, but I have bought a total of 11 for friends and family so far and they use them more than I do, since I have my chamber.

Since then I have also purchased a portable Ozone generator with what I think would be a high enough output but not sure. I charge it via usb and then put it in my Car's trunk (while I am inside my apartment) with non-refrigerated sealed* groceries (I only buy groceries that are completely sealed now) and let it sanitize all around and any mail I might have received. I then take them out of the trunk (in my parking garage with open ventilation). This has given me a small sense of peace of mind but not sure the efficacy. Ozone Output: 498mg/h is the stated output and my car's trunk space seems like an adequate space for it to run in.https://www.ebay.com/itm/NWK-Portable-Cordless-Ozone-Generator-Car-Fresh-Air-Purifier-Oxygen-Bar-Ionizer/383623573525

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Amazon apparently isn't allowed to sell/ship ozone generators to California (only a few seem to have gotten around that restriction, maybe because they don't produce enough or were improperly listed.