Nke a na-esetịpụrụ ha iche pụọ ọzọ ìhè na isi mmalite ndị dị otú ahụ dị ka incandescent bulbs (site a agụụ) ma ọ bụ kọmpat fluorescent bulbs (site gas). 
Nke a na-esetipuru ha iche pụo ozọ ihe na isi mmalite ndi dị otú ahu di ka incandescent bulbs (site a aguu) ma o bu kọmpat fluorescent bulbs (site gas). 