1.With the aid of circuit diagrams explain the difference between a thermal and a glow-type starter for a fluorescent lamp. 2. Show with the aid of a sketch the construction of a high-pressure...

1.With the aid of circuit diagrams explain the difference between a thermal and a glow-type starter for a fluorescent lamp. 2. Show with the aid of a sketch the construction of a high-pressure mercuryvapour lamp. Clearly label all parts. 3. Why should a low-pressure sodium-vapour lamp be mounted horizontally? What is the most common application for such a lamp? Why is this?