I think they're scamming you, trying to make excuses for their rubbish product. Would you let a camera manufacturer tell you their camera doesn't work inside because "it's a problem with the circuitry or something" and to only use it in sunlight? BTW, I use my camera as a light meter, not very accurate because you can only read to the nearest f-stop, but at least I can get readings from fluorescent lights, LOL.

I suspect the light meter actually reads infrared because it likes the sun but also has a penchant for low powered incandescent bulbs also. I would return it (I still might) but it has a water meter and a ph meter for 7 bucks so unless I find something better I'll just have to sacrafice. I need the water meter for hard to reach and large pots (and since I have no growing instincts whatsoever). The PH meter is more of a novelty since houseplants will grow in almost any PH range. Maybe not as well, but I just want them to live, rapid growth isn't needed.

How do you use your camera. I have a very simple camera. I could see if it wants to flash or not but that doesn't tell me a whole lot.