MECCANIXITY COB LED Light Chip Bead 3W 280lm 6000-6500K 20mm 5VDC Energy Saving Bulb for Spotlight Floodlight Replacement White 5Pcs

1. Bulb color is very white. Do not see any tinge of blue. 2. Of the package of 5 I received, all seem to be about the same color and brightness. 3. The 20mm(.80") size is the diameter/size of the puck, not of the cob led. 4. They are very bright when supplied with 3w of power. 5. The backing plate/heat sink does get too hot to touch when driven at 3w. 6. In regards to the brightness, they are about as bright as my Phixton LED flashlight in LOW LIGHT mode.

I used these as a replacement bulb for a flashlight and for a overhead desk light. These are very bright, but like the listing says, you will need to add a heat sink to these COB lights. Without a heat sink, with a 6 volt input, they get very very hot. Using them with a USB charger/5 volt, they still get hot without a heat sink. With a heat sink, they just get warm, and won't melt plastic. Just make sure to use thermal glue and not something else when adding the heat sink.

So I'm not exactly sure what the actual intended use are for these... but they are working well for my project! I am using them to replace the overhead light bulbs in my car. The listing states they are 5V LEDs. The PCB in my car delivers 3V to each light and that is enough power to make these MUCH brighter than the factory lights! I used thermal glue (not thermal paste - thermal glue) to attach Raspberry Pi heatsinks to the back and soldered 22 gauge wire to the contacts. I can't speak to longevity, but they're LEDs so they should last a good long while. If not, they came in a 5 pack and I only needed two. So I should be set for a while! Just a side note. I tested them prior to install with AA alkaline batteries after soldering to verify I didn't anything burn out. One alkaline battery (1.5V) was not enough electricity to generate any light. 3V works well. So make sure the voltage in your application is in the 3-5V area. ;)

These LEDs work exactly as they should. The reviews stating that they get hot, blow-up, burn out immediately are a result of improper use. These LEDs MUST be used with an LED Driver Board so the user can adjust the current. IF they are operated at their rated current, they do need a heat sink; it is a 3 Watt LED and dissipating 3 Watts in this small package will get hot. I run these using a LED Driver I bought on Amazon (Pokertry, Adjustable Current LED Driver) at about 75 mA. without a heat sink. It's a small diorama so I needed to run with a lower lumen output. Bottom line-Read the instructions and follow them. The Seller clearly states they need to be operated with a constant current LED Driver.

I used 5V Output adapter as per the product specification. I. No time it got so hot that it melted the soldering and the glue used for mounting the bulb on its own heat sink ! Fire or severe burn hazard. Do not recommend. Bulb is pretty bright though. Tried two bulbs and got same result.

They were just what I needed for my small flashlight. Had to modified the reflector to except the lens. Very bright. No dark spots.

This LED worked perfectly to replace the one on my bench top band saw. I had to research to find this as the replacement part was not available from the manufacturer. This worked fine and was much cheaper.

Perfect replacement for Craftsman drill press light.

I used these to replace the 3W CREE XP LED light chips in my stair lights which are hard to find at any retail outlet. They work really well with a bright 6500K cool white light.

ma lampe fonctionne très bien avec les ampoules

Bought this to replace an LED in a salt lamp that had a colour changing LED. It didnt last a minute and burnt. Stated for 5v but probably best to run lower.

These are fairly compact but the height is high. The contacts are were marked. The connection needs to be soldered or small clips. The bottom is aluminum for heat dissipation. Solid light with no flickering or fading.

Ne fonctionne pas Tout est bien installer par un électricien et rien ne fonctionne