Oh for sure panels are better than bulbs. But what are panels if not contiguous LED bulbs
Panels will give a higher intensity output, hence better PPFD at larger distances over larger areas.
Eg: a panel will give good intensity say avg 500 PPFD over an area of 1’ x 1’ while the distance from plant to panel is 18”.
To achieve the same 500 PPFD, I have to bring the light to as close as 4-5”. And 1 bulb will only cover a diameter of 8-9” at best.
Also, larger distance from plant to panel helps the plant grow towards the light, so taller plants with good internodal space.
With LED bulb, short, bushy and very tight internodes.
With panels you also have the option of a mix of red and blue diodes. With bulb, you rely on mimicking warm/ cool daylight so only 6500K temp bulbs are usable.
Panels the clear winner. But we guerrilla all the way
Next grow I’ll think about a complete outdoors window grow. Let’s see how that pans out. Summer is just around the corner!