led panel got resistors on each led for whatever reason ( under a shrinked tube... unkown resistance )

I asked to 12voltsguy.com thorugh an email, who is the "composer" of the article I posted the link. He didn't gave me a GREAT AND DEDICATED ANSWER BUT he told me, 1/4 watt resistors are used to cheat the flashers on led turn signals. I had to take my own conclusion with that anwers... so being these bulbs are originally 21 watts each, I think 1/4 watts should be enough then.