Wǒ bǎ jiā lǐ de dēngpào dōu huàn chéng le LED dēng.
I swapped all the bulbs in the house for LED lights.
Tips
usage
Letters in Chinese words are pronounced with their English letter names: 'L-E-D' - most speakers just say the English letters. Common related terms: 灯泡 (lightbulb), 节能灯 (CFL energy-saving bulb - older tech that LEDs replaced).