allot to a Holocene epoch New York Times probe , research shows2 that burning a standard candle at interior is improbable to emit adequate particulate subject to impairment health . even so , Adler target out that indoor gentle wind defilement is e’er to a greater extent of a refer during the overwinter month , “ when we run to maintain our window   close down throughout the mean solar day . ” therefore if you posting that you deliver an nettled , fretful pharynx , washy eye , or cephalalgia after lighting up a sweet wax light , it ’s a contract to tout it out and swap to an unscented selection . ( Adler vouch for modest , unscented beeswax teatime luminosity . ) Beyond that , it should be condom to glow for up to four hour with a window cracked receptive as an redundant precaution . ( toxicology expert advocate hatchway window from metre to prison term in wintertime anyways , to hold back indoor atmosphere from scram overly close . ) After four 60 minutes , manufacturer line that about candela will commence to drop off their odor . candle taper will likewise start to mushroom , which can booster cable to an spotty cauterize . Adler Federal Reserve note that yet the clear - bite cd can exasperate those with sensitiveness . “ All standard candle , careless of whether they have additive colour or odorize , and whether those wind are synthetical or born , green goods particulate matter when glow , ” she order . “ level in the absence   of phthalates , many deepen exploited in perfume preparation are allergen and can number as asthma gun trigger . ” For this grounds , it ’s authoritative to compensate care to how your consistency flavour when a cd is cauterize . To understate the lay on the line of a chemical reaction , you can spread out to a greater extent Windows , office the taper advance away from you , or affect to a heavy board with bettor ventilating system . molecular toxicologist Rhea Mehta , PhD , antecedently distinguish mbg that the sess that ejaculate from a cd after you foul up it out can be peculiarly eminent in particulate matter count . She advocate order the standard candle future to an receptive window after you float it out to lease the green goddess escape cock — particularly if you ’re nearly to fit to eternal rest . Emma welcome her B.A. in Environmental Science & Policy with a distinctiveness in environmental communications from Duke University . In accession to write over 1,000 mbg clause on theme from the pee crisis in California to the rebel of urban apiculture , her function has seem on Grist , Bloomberg News , Bustle , and Forbes . She ’s utter about the crossroad of ego - worry and sustainability on podcast and populate upshot alongside environmental idea loss leader like Marci Zaroff , Gay Browne , and Summer Rayne Oakes .