3 ms·A single small piece of aluminum foil under the tape will block all light.by lazide 1y agoA single small piece of aluminum foil under the tape will block all light.octo888 1y agoThat's exactly what I did on the next one but I think my aluminium foil was cheap because I'm sure one layer didn't do it LOLlazide 1y agoIt sounds like you might have a diode pumped laser for a status LED too hah