Ricky Navthani has been trying to shed some light of Philip's question, about when he should replace his old CFL lights for more efficient LEDs. Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

Can mosquitoes transmit HIV?

Each week we set out to solve one of the world's weirdest, wackiest, funniest and funkiest scientific puzzles. And along with the answer there's a brand new question to think about for next time...