For strappy lashes, you can use them as long as you want. Since they are located close to the lash line, you don't have to worry about damage to your eyelashes. I recommend that you remove your false eyelashes when you remove your eye makeup. So, you can use them all day long, but you may need to reapply the eyelash adhesive.
I don't know anything about false eyelash strips, but they have these types of false eyelashes applied individually, which are actually groups of two or three eyelashes. They stand between real eyelashes to help fill them in. You can apply them yourself or do it professionally. I had them inserted for a wedding.
They're supposed to last at least a week, maybe longer, if you don't rub your eyes. Depending on the adhesive and the skill used to apply false eyelashes, they can last between 3 and 7 days. However, some brands like Ardell will say that you should wear them for a maximum of 12 hours straight. If you need them to last all day or all night, opt for a long-lasting adhesive formula and apply them with special care to ensure that your eyelashes adhere securely.
Also, avoid rubbing your eyes so you don't shed your eyelashes, even if they feel unusually heavy in your eyes. I have never discussed any safety issues related to the use of my false eyelashes, but this is how I do it and it has never given me any problems. But, if you want your eyelashes to last longer, be careful not to apply any oil-based product to them. Finally, false eyelashes can block or obstruct hair follicles and oil glands, as well as trapping dirt and germs.
False eyelashes will blend in perfectly with your regular eye makeup routine no matter what busy lifestyle you lead. I never spent more time than that, because my eyelashes would be less secure after the second day and I felt a little disgusting not to wash my face 100%. Apply just a few lashes to the corners instead of an entire strip if you're having trouble getting it to fit or look natural. While eyelash extensions can give you the appearance of longer, fuller eyelashes every day, you can lose them as the extensions fall out.
Both individual eyelashes and eyelash strips are inexpensive and widely available, but are a temporary solution. Eyelash extensions applied in the beauty salon can last as little as a week or up to six weeks, depending on how you care for them. The idea is to have light false eyelashes that are comfortable, so you don't feel like your eyes are too made-up. Depending on the lashes you choose, you can add just a little bit of length and volume, or long, lush lashes.