jojofuny 4pcs LED Filament 300mm Flexible Filament Light for Retro Bulb Repair Accessories - Warm Light Source for Indoor_Outdoor Lighting

I love playing with new components for my projects. These filaments have been on my wish list for a while. they are really cool to use but they can get pretty warm.

They're fine.

I did not get these to repair a light bulb. I got these to create new craft projects creating a miniature neon lighting effect. This is a good price for four filaments. Each filament is a very thin line of LEDs in a silicone cover about the thickness of a thick strand of spaghetti. They run off 3V and can be powered by a coin battery like a CR2032 or off of a Arduino board. Each end is terminated with a metal connector as opposed to a wire lead. See the pictures to see what I mean. One end has a small hole in it to indicate polarity.These are VERY flexible and can be bent around tight corners without issues. That being said they are subject to the kind of issues that can cause a wire to break due to strain, so figure in strain relief and watch for vibration wear.

The media could not be loaded. 3d printed this for a friend. i really liked working with these and their light diffusion looks really good though 3d printed plastic. the only downside and the reason for 4 stars is no data sheet and they are a little pricey. for reference the plastic thickness is .12mm and the led diffusion thru the red plastic ran at 5v 22ma and the blue plastic 5v 50ma. will definitely buy more of these in the future.

I've always been curious about these faux-filament-form-factor LED strands, and I was excited to try them out at their recommended current levels and see how they behave.Difficulty: they arrived in a baggie with zero documentation. Not even anything to tell you which end is which, never mind recommended voltage or current.No problem, I'm sure it's spelled out in the product listing. Let's see: "Cooking spoon rest ceramic" -- um, that's not exactly what I was looking for. "Washing machine drain seal" -- wait, what? Did someone just google "silicone noodle" and paste the result into the description?I ended up fishing around online for info on comparable products. To summarize, so you won't have to do the same work I did:VOLTAGE: These apparently want to run off around 3 volts. Don't try to hook them directly to 110V or 220V AC, despite the images in the listing. Or do, if what you want is a one-time-use flashbulb.POLARITY: The connector with the hole is the anode (positive terminal).CURRENT: They're pretty bright with 100-200mA driving current. At that level, the voltage drop is around 2.5-2.6V.They're VERY bright at 3V, at which point they're drawing 600mA, and starting to get quite warm. The thermal camera said they stabilized a bit above 47˚C. That's probably hotter than you'd want to run them for long-term use, and they'll get hotter if they're in an installation that doesn't have good ventilation.If you try to run one off a coin cell, it'll be dim, and the cell will die quickly. If you try to run one off a 3.7V 18650 cell without a resistor or a current limiter, you'll probably cook the strand.These are 300mm from connector tip to connector tip. The actual lighting-up part is around 285mm long. The individual LEDs are spaced a millimeter or two apart. At lower brightness levels, you can see them, but they aren't obvious. At higher levels, they're even less obvious.Emission is slightly directional, but the silicone does a good job of diffusing light. The side the emitters face is brighter than the "back side", but the difference isn't distracting.I can't yet speak to longevity. I DO wish we had some guidance on recommended current levels. If documentation had been provided (even a link from the listing), I would have given these five stars.