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User:Mentar/LED lighting proposal: Difference between revisions
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** The galvanised steel stud provides a basic reflector and heatsink while the lip allows mounting of diffusion plates. Can also be used as the ground plane, simplifying connections. | ** The galvanised steel stud provides a basic reflector and heatsink while the lip allows mounting of diffusion plates. Can also be used as the ground plane, simplifying connections. | ||
** Makes use of a range of un-needed power supplies | ** Makes use of a range of un-needed power supplies | ||
** Modular, so easy to replace broken | ** Modular, so easy to replace broken parts | ||
* Cons | * Cons | ||
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Total cost: ~ £17.37 (to compare 8ft 100W fluorescent tube only, no fittings! costs £15.59 on [http://www.lampshoponline.com/f100w-t12-fluorescent-tube-8ft-100w/ LampsOnline]) | Total cost: ~ £17.37 (to compare 8ft 100W fluorescent tube only, no fittings! costs £15.59 on [http://www.lampshoponline.com/f100w-t12-fluorescent-tube-8ft-100w/ LampsOnline]) | ||
=== Implementation === | |||
At 3.5V each LED consumes around 750ma. 5 LEDs in series would need 17.5V across them. We need 3 of these arrays to make up 15 meaning that we have a current draw of 2.25A for a total of 39.375W. Which is well within what even my weak 60W X220 thinkpad PSU can deliver. | |||
