I need a lightbulb that gives the equivalent of 100w of light, has a regular medium screw base (e26, I think it's called) but it can't be longer than 10-11cm (4-4and1/4inches) which makes it an A15. Essentially, it would be about the size of an appliance bulb to fit where I need it to while being as bright as a regular bulb can be. It's proving pretty difficult to find the bulb I need so I was wondering if I could buy a regular led bulb that gives the equivalent of 100w of light, remove its dome-shaped diffuser and glue a flat lid on it?

Since the base and led parts total just 7.5 cm (3in) it would make the bulb the right length and I hope adding a replacement lid would keep it safe. Would that be okay and if so, what glue should I use? Super glue, cement glue, silicone? And what should the lid be made of, plexiglass, glass, any stiff plastic sheet?

Some more information. Once the bulb was in place I wouldn't touch it. No one else would be using this fixture but me and, when that day comes, I can easily unplug it to change the bulb when it stops working. In other words, I'll never fiddle with it while it's on.

Thanks for reading this and for any suggestions you might have.