Although it is bright, I think that the spiral type is weak against shock and it is ineligible for working light. We have already damaged four and damaged a lot of loss. For the maker it will be profitable but I think that we want you to release a strong type such as wrapping in a sphere like the original type as soon as possible.
Although it is very bright and easy to see, I think that it is suitable for working lights. Because the weight of the bulb is heavy it will be damaged by a bit of thing. Of course I think that it can be used enough instead of a light bulb.