I am currently using 4pcs. of 500W halogen flood lights to light up the sign and interior of our showroom during the night and i have just realised that these lights cost me about 60 $ a month to run which is a bit too much. (electricity costs 0.16$ per KWh here and these bulbs run for 6 hours a day)
i could use 300W or 150W halogen bulbs to bring down the running costs but still they are fragile and unreliable, their colour is ugly and still cost a bit much to run.
So i was thinking of using LED power in this application to reduce running costs and get a nicer more noticable white light color.
preferably i will not use luxeons due to the thermal issues, besides, 5mm LED's seem to be more efficient these days. also because i do not need throw but flood.
i am therefore thinking of using 400pcs. of 5mm wide angle LED's per unit therefore having a total of approx 2,800 lumens per unit ( using the current approximation of 7 Lumens per latest 5mm LED ).
i do not know how many lumens a 500W halogen flood light emits but 2,800 lumens seem like plenty for my use.
now if i run them in a series-parallel configuration @ 12 Volts and 30 mA each, that would be approx 50W per unit and cost me approx 6 $ a month for all 4 units. correct me if i'm wrong.
so my question is: where do i buy 1600 pcs. ( maybe even more ) of the latest, brightest, whitest ( not yellowish or bluish ), wide angle ( 80 - 100 deg. ) 5mm LED's ?
EDIT: they must be very well priced too... and have agood lumen maintenance.