1. Lumen e phahameng, khanya e phahameng.
2. Boloka litšebeletso tse fokolang tsa nako e telele
3. Tšebeliso e tlaase ea matla, matla a phahameng, ho fokotsa lumen e tlaase.
4. Moralo o ntlafalitsoeng oa radiator ho netefatsa sistimi e pholileng e ntle haholo.
5. Ho kenya habonolo, ho boloka matla a maholo, ho ka nka sebaka sa lebone la incandescent / halogen ka ho toba