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Beam Comparison - Dimming 2
Four Cree XR-E at dimming level 1 (3.80v on 3021 control pin = about 150mA) with 6-6-6-6 degree lenses.
Beam Comparison - Dimming 1
Four Cree XR-E at dimming level 1 (3.09v on 3021 control pin = about 300mA) with 6-6-6-6 degree lenses.
Beam Comparison - 6-16-16-6 Diffusers
Four Cree XR-E at 700mA with 6-16-16-6 degree lens + diffusers.
Beam Comparison - 8-16-16-8 Diffusers
Four Cree XR-E at 700mA with 8-16-16-8 degree lens + diffusers.
Beam Comparison - 10+5W Halogen
Sorry this is so dark, but had to make it so to be a fair comparison with the other beams.
Mill Optics
An L2 Optics lens after a bit of milling - fits the MCPCB a treat now.
Ah - because of the way the middle two LEDs connect one of the remaining corners will also be removed for each of the centre lenses.
Prepare Optic
These L2 Optics, although made for Cree LEDs don't account for any connections made atop the MCPCB the Crees I bought came mounted on.
Not that big a deal - get the Dremel (or knock of rotary tool) out and mill the bottom a bit. The adhesive that's fitted bottom of these does nothing but get in the way of that process though - so chop out where you'll be milling first.
Oh - stuff something (tissue here) in where the LED goes - don't want hot plastic shavings getting in there.