# LED bulb Disection

#### Nathan Hale

Joined Oct 28, 2011
146
Hello folks, Hope all is well with everyone.
I bought an LED bulb this past summer. The bulb burned out last week and i opened it up , curious to know how an LED bulb looked like inside. Could you guys please let me know what those tiny yellow rectangles area?
The ones lying down flat have markings beside them that say "D1, D2,D3 ..."
The ones vertical have markings that say DV1,DV2.....etc..

#### blocco a spirale

Joined Jun 18, 2008
1,546
Surprisingly, those yellow rectangles are LEDs; did you expect to find something else in an LED bulb?

#### dl324

Joined Mar 30, 2015
9,317
Yup, they're LEDs. Most LED bulbs have at least a one year warranty; some of mine are 5 years.

#### Roderick Young

Joined Feb 22, 2015
408
D stands for Diode, so those are LEDs, of course. The yellowish tint is to counteract the natural bluish tinge of the LED to make a warmer light. My guess is that the DV stands for a Vertically mounted LED. Notice how everything is set up to carry heat away from the LED. If you were to look deeper into the base of the bulb, the electronics to supply the proper current to the LEDs should be in there.

I'm curious - what brand of bulb was it, if you remember? We have yet to burn out a single LED bulb after about 2 years of use. I'm starting to see bargain LED bulbs now - pack of 6, 60W equivalent FEIT LED bulbs for $12 at Home Depot. But I wonder if the newer ones are poorly made. The original compact fluorescent bulbs lasted forever. We still have one from 1990 that has been in continuous use. Once CFL bulbs became mainstream and cheap, they started burning out after just a year or two. #### Roderick Young Joined Feb 22, 2015 408 I see 3 of the vertical LEDs missing in the picture. Could it be just one or more fell off? Maybe you could fix the bulb if you soldered the loose ones back on? Thread Starter #### Nathan Hale Joined Oct 28, 2011 146 D stands for Diode, so those are LEDs, of course. The yellowish tint is to counteract the natural bluish tinge of the LED to make a warmer light. My guess is that the DV stands for a Vertically mounted LED. Notice how everything is set up to carry heat away from the LED. If you were to look deeper into the base of the bulb, the electronics to supply the proper current to the LEDs should be in there. I'm curious - what brand of bulb was it, if you remember? We have yet to burn out a single LED bulb after about 2 years of use. I'm starting to see bargain LED bulbs now - pack of 6, 60W equivalent FEIT LED bulbs for$12 at Home Depot. But I wonder if the newer ones are poorly made. The original compact fluorescent bulbs lasted forever. We still have one from 1990 that has been in continuous use. Once CFL bulbs became mainstream and cheap, they started burning out after just a year or two.

http://www.feit.com/led-lamps/performance/performance_led/performance_led/a19/bpom60-830-led

#### Nathan Hale

Joined Oct 28, 2011
146
I see 3 of the vertical LEDs missing in the picture. Could it be just one or more fell off? Maybe you could fix the bulb if you soldered the loose ones back on?
yes u r correct. some of the leds came off while disassembling the bulb. and the electronics inside the bulb! oh boy! it almost looks like a small micro controller or something!

#### RichardO

Joined May 4, 2013
2,268
yes u r correct. some of the leds came off while disassembling the bulb. and the electronics inside the bulb! oh boy! it almost looks like a small micro controller or something!
This LED lamp is dimmable so the control has to be complex.

#### hp1729

Joined Nov 23, 2015
2,304
Hello folks, Hope all is well with everyone.
I bought an LED bulb this past summer. The bulb burned out last week and i opened it up , curious to know how an LED bulb looked like inside. Could you guys please let me know what those tiny yellow rectangles area?
The ones lying down flat have markings beside them that say "D1, D2,D3 ..."
The ones vertical have markings that say DV1,DV2.....etc..