led ๋„๊ณ  ์“ฐ๋ฉด 32์‹œ๊ฐ„๊ฐ„๋‹ค๋Š”๋ฐ led ํ‚ค๋ฉด ๋ช‡์‹œ๊ฐ„๊ฐ?