Timeline for LED lamp - connecting LEDs in parallel
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 22, 2020 at 15:10 | comment | added | Andy aka | My point is that you shouldn't draw generic conclusions about LEDs by examining the "apparent" design of one product whose quality pedigree isn't established. | |
| Jan 22, 2020 at 14:54 | comment | added | plumbum_by | You can find more details via link: horticulturelightinggroup.com/collections/quantum-boards/… And it also is selling as a kit with Meanwell HLG-120H-54A constant current power supply horticulturelightinggroup.com/collections/kits/products/… | |
| Jan 22, 2020 at 14:20 | comment | added | Andy aka | @plumbum_by What does the product specify should be used as a power supply? Are there more product details anywhere? It's usually the case that lack of product details can mean lack of product quality and so you can't really make generic design assumptions based on what you see in a product that might be somewhat lacking in quality documents. | |
| Jan 22, 2020 at 14:10 | comment | added | plumbum_by | It's not resistors, it's 660nm deep red leds. In this case i'm sure there are no elements on bottom layer: it's aluminium PCB, adding bottom layer will increase cost, and will not allow to attach PCB to heatsink. This PCB even don't have vias and all elements are surface mount and it looks reasonable. | |
| Jan 22, 2020 at 14:02 | comment | added | Andy aka | @peufeu it's a good spot and you could be right. The bigger picture is not to assume anything about a product whose details are scant at best. After all, who is to say what's on the underside of the board that might make a mockery of any assumptions? | |
| Jan 22, 2020 at 13:52 | comment | added | bobflux | I'm betting the "R" stands for "Red LED" as these things definitely don't look like resistors, and the description mentions 16 red LEDs... | |
| Jan 22, 2020 at 13:26 | history | answered | Andy aka | CC BY-SA 4.0 |