The a.c. voltage concurrently induced in secondary winding 12 of transformer 1 is applied between {HEAD ~ the filament} 22 of {TAIL ~ the fluorescent lamp} 2 and the reflection plate G. When thermal electrons are emitted from filaments 21 and 22 sufficiently, a small discharge begins between the filaments and the reflection plates and in a short time the discharge expands to the entire fluorescent lamp and then develops into a perfect discharge 
The a.c . voltage concurrently induced in secondary winding 12 of transformer 1 is applied between { HEAD ~ the filament } 22 of { TAIL ~ the fluorescent lamp } 2 and the reflection plate G. When thermal electrons are emitted from filaments 21 and 22 sufficiently , a small discharge begins between the filaments and the reflection plates and in a short time the discharge expands to the entire fluorescent lamp and then develops into a perfect discharge
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