Grow Lights

This interview with  Dr Krusse says red and purple light is important:
https://www.youtube.com/watch?v=HFZcngTf4Do

Has anyone tried using grow lights light this:
https://www.ebay.ca/itm/Mars-300W-600W-LED-Grow-Light-Full-Spectrum-Hydro-Veg-Bloom-for-Hydroponics/263291162010?hash=item3d4d604d9a:m:meKcoI-_hDEUrx_W22xr2rA:rk:19:pf:0&var=562300477414&autorefresh=true
for getting full spectrum light in the house when there isn't much sun outside?

I wonder if they cause DE since LEDs are DC and there is a switching supply in there.. surely some will, but some will be better. Anyone tried?

Lots of DE. Some large ones are bad enough to violate FCC rules and blot out HAM radio stations miles away.

I like the light from an old fluorescent grow bulb, but it is loud on my AM radio and has a magnetic ballast. Not sure what the best solution is

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Karl wrote

Lots of DE. Some large ones are bad enough to violate FCC rules and blot out HAM radio stations miles away.

I like the light from an old fluorescent grow bulb, but it is loud on my AM radio and has a magnetic ballast. Not sure what the best solution is

I have a full spectrum fluorescent, but it's on a dimmer. Perhaps if I take out the dimmer it will make less noise. It does make a lot of noise on the AM... It's a nice light, but I wonder if the EMF it throws out is worse than the benefit.

Is it a compact fluorescent, or one of the big tube lights?

A lot of modern CFL bulbs seem to have small (probably switching) power supplies. Most of the LED grow lights I've looked at also have switching power supplies, but some of the strip lights and bare LEDs can be hooked up to a non-switching power supply.

I don't like the light quality from any of the strip lights I've bought, but at least they don't require a heat sink or active cooling.

The closest I've come to a comfortable lighting solution is to buy bare RGB LEDs and drive them with a battery or some other clean DC power source. I got some at Sparkfun that were similar to this (but cheaper and with a common cathode):

https://www.sparkfun.com/products/8718

They needed at least a modest heat sink and wouldn't run in series for some reason. I didn't have any 2.4-3V regulated power supplies at that time, so I ended up powering them with two NiCd D cells in series, which would run brightly for a few hours and then limp along at a low output for another 4-6 hours. I also ran into this: https://forum.sparkfun.com/viewtopic.php?t=9138

The light was salmon-colored (not bad before bed). Mixing it with one white LED produced a nice daytime color. (You can also buy RGBW LEDs.)

I have some of these, but they get really hot and need active cooling: https://www.amazon.com/gp/product/B00MTJ7QKM

I like the light color from these: https://www.amazon.com/gp/product/B004285ICQ

...but pretty much any arc lamp (fluorescents, metal halide, sodium vapor) is supposed to produce RF. This one and the fluorescent grow lights I've tried do make a lot of noise on the AM radio. I tried to kill it with a toroidal isolation transformer, but the noise passed right through that :(

It might have worked if I'd used a transformer with an electrostatic screen. I've been intending to buy one of these to test that: http://www.antekinc.com/content/AS-05T120.pdf