Honoson 10 Pieces E10 LED Bulbs 3 Volt Miniature Flashlight E10 Replacement Bulbs Mini Lamps Cool White

Provides a bright clear light, but you have to be careful of the polarity; it's opposite that of the incandescent bulbs in most of the flashlights I was trying to upgrade. The set came in a nice storage box.

At my old Sun City home, address light uses 4 lamps, two in series, then in parallel, door bell transformer voltage works great! Or possible this comment is for a different voltage lamp.

These 3-volt pre-focus LED bulbs are direct replacements for those used in many smaller flashlights and penlights. Upgrading is as easy as removing your exiting bulb and installing one of these. The package I bought has 10 bulbs in a reuseable plastic box, and at $8.99 for the pack, that's less than 1$ per bulb - which is a great value in my book. These bulbs are classified as "cool white", so the light they create is a crisp blue white in color. I can't speak to the life span of the bulbs or if your batteries will last longer, but I would assume an LED would use less power than a filament bulb. My only concern is that the bulb I "tested" was just a millimeter smaller at the base than the filament bulb it replaced. That may or may not be true of the other bulbs in the pack and it did not keep the bulb from working properly once it was seated.

I discovered an old penlight in my stash of junk. With a pair of AA batteries and an incandescent bulb it was pretty dim. Not quite useless but not something I'd reach for if I needed a light.In the last few years I've come to dislike incandescent bulbs for general illumination. LEDs are brighter, more energy efficient, and last a lot longer. As a result, even though this penlight is a useful size and seems tough as nails (it has an all steel body), it sat unused.One day I took it apart on a whim and, after some detective work, discovered that the bulb was an E10. This pack of 10 bulbs was the least expensive option for LED bulbs so I ponied up $8 and waited a couple of days.The bulb dropped right in and, with a freshly-charged pair of AA batteries, the light is WAY brighter than with an incandescent bulb. It's about as bright as any of the other AA/AAA penlights that I've seen. It's quite useful for small repairs and task lighting, and it fits unobtrusively in a pocket or tool bag. It isn't a flashlight but it can do a lot of flashlight stuff in a pinch-- I've used it to walk around in a dark backyard, for example.I bet there's a lot of these penlights sitting unused in junk drawers everywhere. Adding an LED bulb converts them from another piece of obsolete technology to a useful tool. Now I have to keep from buying every old garage-sale penlight I see. I DO have another 9 bulbs, after all...

Fit my hundred year-old flashlight perfectly.Much brighter than the incandescent bulb.A very good deal!

I bought this for my science classroom for Flinn product AP9058. It works perfectly! The LED lights are bright and screwed in exactly right. The only issue, which isn't really an issue at all with the product, is that I tried to use a 9V battery to turn it on like I do the incandescent bulbs. It burned it out immediately (duh...). The max voltage is 3V, and it needs very little current to turn it on. It was useful because 2 AA batteries worked well to test the semi-conductivity of silicon, whereas an incandescent bulb needs a 9V to have enough current.

I bought these bulbs to replace incandescent bulbs on my East German Traffic Safety Belt. Did not work. I think since LEDs are polarity specific. This belt may be be reversed. Incandescent bulbs work either way. But LEDs will not . I didn't check because I had no reason to. My bad. I won't return. My fault. Not yours.

Very bright