They are portable, very bright and durable. I even use them sometimes in the studio along with all the big lights. At first I didn't think I needed two tones, but then I had a photo shoot with a metal artist and I found that two tones really improved the lighting situation. In the photo shown, I used an 8000K LED panel for pure light behind the artist's silhouette and a 4000K LED panel for sparks to illuminate the fiery glow. Very happy with it! Haven't run them on battery yet to comment on this.
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