▁provide ▁extra ▁light ▁is ▁to ▁place ▁the ▁b ons ai ▁close ▁to ▁an ▁outside ▁window . ▁Care ▁must ▁be ▁taken ▁not ▁to ▁harm ▁the ▁plant ▁either ▁with ▁cold ▁air ▁entering ▁through ▁the ▁window , ▁or ▁with ▁high ▁radi ated ▁heat ▁from ▁direct ▁expos ure ▁to ▁the ▁sun . ▁More ▁cont roll able ▁light , ▁and ▁more ▁flex ibility ▁in ▁situ ating ▁the ▁b ons ai , ▁can ▁be ▁obtained ▁using ▁artificial ▁light ing . ▁Fl u ores cent ▁light ing ▁( pre fer ably ▁with ▁bul bs ▁radi ating ▁growth - friend ly ▁spect ra ) ▁and ▁light - em itting ▁di ode ▁light ing ▁can ▁give ▁sufficient ▁light ▁to ▁support ▁a ▁significant ▁number ▁of ▁ind oor ▁b ons ai ▁species . ▁These ▁lights ▁also ▁have ▁the ▁advantage ▁of ▁bl ending ▁with ▁other ▁ind oor ▁light ing , ▁so ▁that ▁the ▁plants ▁can ▁be ▁grown ▁in ▁normal ▁living ▁qu arters . ▁For ▁plants ▁need ing ▁the ▁highest ▁amount ▁of ▁light , ▁or ▁for ▁large ▁numbers ▁of ▁b ons ai ▁being ▁maintained ▁ind o ors , ▁a ▁space ▁dedicated ▁to ▁b ons ai ▁cultiv ation ▁can ▁support ▁high - int ens ity ▁l amps ▁and ▁option ally ▁the ▁special ▁vent ilation ▁or ▁cool ing ▁often ▁needed ▁for ▁their ▁use . ▁ ▁Tem per ature ▁ ▁Su itable ▁temper atures ▁for ▁ind oor ▁b ons ai ▁extend ▁from ▁standard ▁room ▁temperature ▁down ward . ▁The ▁best ▁temperature ▁range ▁for ▁a ▁tree ▁is ▁determined ▁by ▁its ▁species ▁and , ▁less ▁directly , ▁by ▁its ▁normal ▁range