ma hi alkhutwat al'uwlaa qabl shira' shashat LED shafaafatin?

yujad 'akthar min 500 masnae lishashat aleard LED fi alsiyni.

qabl shira' shashat LED shafaafat , ma hi alkhutwat al'uwlaa؟

tatamathal alkhatwat al'uwlaa fi tahlil musanaeay shashat aleard LED alshafaafat watahlil 'asear shashat aleard LED alshafaafati.

kayf tajid jamie alsharikat almusanieat lishashat LED alshafaafati?

kayfiat alhusul ealaa alsier alhaqiqii lishashat LED alshafaafati?

'iidha kan hunak nawean faqat min 'asear shashat aleard LED alshafaafatu:

'ahaduhuma min mudir mabieat walakhir min alrayiysi.

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