This fairly common red/blue grow lamp has a rather pleasing array of 126 LEDs arranged as 90 red with a star of 36 blue.
Hyped power is 15W. Measured power is 5.5W. Actual power dissipated in LED panel is 5W.
Lamp uses a switching buck regulator that puts out 50V at 100mA and does NOT have an isolated output.
All solder joints on the front of the PCB should be treated as being at full mains voltage. This doesn't seem like a very good idea for a grow light, as the plants will naturally grow towards the lamp and if a juicy shoot or stem touches any metal, then the whole plant will become live.
Hyped power is 15W. Measured power is 5.5W. Actual power dissipated in LED panel is 5W.
Lamp uses a switching buck regulator that puts out 50V at 100mA and does NOT have an isolated output.
All solder joints on the front of the PCB should be treated as being at full mains voltage. This doesn't seem like a very good idea for a grow light, as the plants will naturally grow towards the lamp and if a juicy shoot or stem touches any metal, then the whole plant will become live.
Does it shock the plants into growing?
Using blurple LEDs as a grow light is old tech by now. There are way better choices for growing plants indoors. Especially popular these days are white diodes with a few far red mixed in to get "full" spectrum. There are plenty of new studies that show us different light frequencies have different effects on plant growth. Also blurple LED fixtures are usually less efficient than white ones.
I work in PCB manufacturing and I really enjoy your videos, been watching them every night for the past 2 weeks lol
A female friend of mine asked me to get her a "plants lamp" for a birthday present and I just searched for that, acquiring a 50ish EUR lamp from a domestic supplier. It came overnight packed just in a plain cardboard box and inside that it was wrapped in a plain clear plastic bag, so there was no much unboxing, and I couldn't help trying it out. I found the hard pink light quite appealing for some reason. So I thought that is what she might have wanted and wrapped it up nice. We had had some incandescent based plant lamps in the 80's when they were "special" and I originally thought this might have an intense white light just as well.
I dropped it off at her party with some small gizmo I planned for the surprise effect and thought to become useful, including a touch screen glove, USB Micro/C adapter and tablet pen.
Two days later she called me and asked what the deal about it was. I asked if there was something wrong and she said "no… not really but it's just different than I expected". Turns out we both had had the same expectation. So I explained to her that as far as I know this design is made to take into account the low absorption of green wavelengths in chlorophyll and that the red and blue band together make the light appear magenta or hard pink, and if it had a closely matched green light source in it, it would appear like "TV white", which I oruginally expected as well. And while not being designed to make colorful plants look pretty, it must be a growth improving lamp.
A week later she called to ask where I had acquired it and how much it cost because two friends of hers had asked her where they could get similar fancy hard pink lamps.
very old gardener here; hydroponics lights are design like fishing lures: to catch gardeners no plants; plants will grow with any light if there is enough of it. remember how we used HP sodium and then metal halide? before that we used daylight fluorescents; worry only about cost and lumens, cri is important for our pleasure not the plants.
Careful which plants you pick – some of them can leave you seeing stars! And whatever you do, don't go for the ones that are already smoking!!!
Uploaded 2 days after my birthday
7 years ago. Lol
If the claim is 15W, but your powermeter showing just 5W… is it safe to assume the Powerfactor is 0.3?
oh I think they relate the 15W to the comparison lumen output compared to a usual incandescent. Amazing videos dude, I love watching your features 😀
My Morning brain warm ups 😉👍
All them dongles you’d think Apple made it.
on this episode of "this was on my recommended"
thank you for the vid