illuminant

• It is true that there were explosions, and distinguished men like Davy and Watt opined that the illuminant was too dangerous; but the "spirit of coal" had demonstrated its usefulness convincingly, and a commercial development began, which, for extent and rapidity, was not inferior to that marking the concurrent adoption of steam in industry and transportation Meantime the wax candle and the Argand oil lamp held their own bravely. —  Edison, His Life and Inventions
• Another indicator for the efficiency of an illuminant is expressed in lumen per watt.
• · Define an RGB space with custom chromaticities, a custom illuminant, and a custom gamma. —  Softpedia - Windows - All
• After development in the usual way--it being carried only a little further than usual--and after fixing, washing and drying, the paper negative can be spotted or retouched, after which it is waxed CHAPTER IV ENLARGING--DAYLIGHT METHODS In taking up enlarging a full knowledge of what has been said as to the manipulation of bromide paper will be necessary, as the principles governing exposure apply here as in contact printing, errors being even more serious, owing to the greater waste of material For the illuminant used in enlarging, we may employ either daylight or artificial light. —  Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements
• In other words, color is due to selective absorption reflection, or transmission Perhaps the ideal illuminant, which is most generally satisfactory for general activities, is a white light corresponding to noon sunlight. —  Artificial Light Its Influence upon Civilization

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