The RGB LED Uplighter is intended to replace a number of wall wash units which originally were designed to have 2 by 26W CFL lamps. Plan A was to change the ballasts for 0-10V CFL 18w units....however RGB started to look attractive.
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Before modification |
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After modification. |
In place of the CFL holders and ballasts are a DMX driver unit and 12 RGB TO-220 LED's - 4 of each colour. The whole assembly is fed via 24V DC using the 1.5mm wiring in place for the 240V AC feed and the DMX is fed through the control cable destined for 10v. The great advantage of home run cabling! A 24V DC 10A supply was already in place in Node 3 for the thermal actuators and relays and has plenty of spare capacity.
The driver is from LED-TEAM and available in 350mA (used here) and 700mA, weirdly the 700mA unit is cheaper. The LED's came as a strip which was cut in two (it was designed for this) and one section forward mounts to reflect internally and the others direct upwards. The photo above shows the unit from the underside and is mounted into the wall mounted housing - see below.
It was decided to use one driver per light in order to get maximum flexibility, as well as it was probably going to be difficult to try and get it all down the existing cabling.
The cost per unit of the change is sub £100, which is much cheaper than any commercial unit with 12W's of RGB LED.
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It is always difficult to get a decent photo with a cheapo camera. At some point I'll get the tripod out and the SLR..... |
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