In a conventional lamp, the evaporated tungsten eventually condenses on the inner surface of the glass envelope, darkening it. For bulbs that contain a vacuum, the darkening is uniform across the entire surface of the envelope. When a filling of inert gas is used, the evaporated tungsten is carried in the thermal convection currents of the gas, depositing preferentially on the uppermost part of the envelope and blackening just that portion of the envelope. An incandescent lamp that gives 93% or less of its initial light output at 75% of its rated life is regarded as unsatisfactory, when tested according to IEC Publication 60064. Light loss is due to filament evaporation and bulb blackening. Study of the problem of bulb blackening led to the discovery of the Edison effect, thermionic emission and invention of the vacuum tube.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What does not cause light loss or bulb blackening?
Ah, so.. unanswerable

There were 15,848 households out of which 27.7% had children under the age of 18 living with them, 24.8% were married couples living together, 23.2% had a female householder with no husband present, and 45.1% were non-families. 37.2% of all households were made up of individuals and 15.4% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 3.26.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many households were there in Atlantic City?
Ah, so.. 15,848

The Second Great Awakening began around 1790. It gained momentum by 1800. After 1820, membership rose rapidly among Baptist and Methodist congregations, whose preachers led the movement. It was past its peak by the late 1840s. It has been described as a reaction against skepticism, deism, and rationalism, although why those forces became pressing enough at the time to spark revivals is not fully understood. It enrolled millions of new members in existing evangelical denominations and led to the formation of new denominations.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did the Second Great Awakening start?
Ah, so..
around 1790