Cree: Difference between revisions

Very compact LED (the die is mounted on a chip 2.45 mm square opposed to 3.45 mm square for XP series) introduced in February 2012, promising lower cost. Should provide similar brightness to XP-E LED's. First available units were warm white with Q2 brightness bin (at 350mA). Can be driven up to 1000mA. [http://www.cree.com/products/pdf/XLampXB-D.pdf Datasheet], [http://www.cree.com/press/press_detail.asp?i=1317907138185 press release].

[[File:Cree-xml.jpg|thumb|Cree XM-L LED with 6 yellow strips and 3 brass bonding wires]]Larger die LED first available in November 2011, offering efficiency of 160 lumens per watt at 350mA. Output is 260-280 lumens at 700mA (bins T5 and T6) therefore it is more efficient and puts out more light at any current than earlier single-die Cree LED's. However the biggest improvement to overall output is the XM-L can be driven to 3000mA for 910-975 lumens of output. The LED die is 2mm x 2mm on a 5mm x 5mm substrate with 6 yellow strips and 3 bonding wires as opposed to the XP-G with 4 strips and 2 bonding wires and the XP-E with 3 strips and 2 bonding wires. The first production lights to feature the XM-L were versions of the [[ThruNite]] Catapult V2 (first to ship), [[EagleTac]] M3C4, a [[4Sevens]] Quark MiNi, and the [[JETBeam]] M1xm, introduced in December 2010, but budget retailer KaiDomain had LED's and [[P60]] drop-ins as well as P60 lights around the same time. Neutral and warm tints began shipping in March 2011. [http://www.cree.com/press/press_detail.asp?i=1271079100891 Press release] [http://www.cree.com/products/pdf/XLampXM-L.pdf Cree XM-L datasheet]

Same size package as the XP-E, but with a larger die. Therefore the resulting beam has a little more flood. It is available in varying output bins from R2 to S3. Maximum current is 1500mA and Vf of 3.3V with efficacy of 132 lumens per watt.

 

[http://www.cree.com/products/pdf/XLampXP-G.pdf Cree XP-G datasheet]

Introduced in February 2012, the XT-E has the same size chip as the XP series but seems to have a wider viewing angle for more flood and less throw. Can be driven up to 1.5A and available in bins up to R5 (at 350mA). This is a high efficiency LED capable of 148 lumens per watt at 350mA. The LED is not a flat square, but has an X shaped hill on the surface. [[EagleTac]] was the first company to feature the XT-E in a production light, making it an option in the D25 clicky series in April 2012. At about the same time, KaiDomain offered P60 drop-ins and flashlights with the XT-E. [http://www.cree.com/products/pdf/XLampXT-E.pdf Datasheet], [http://www.cree.com/press/press_detail.asp?i=1317907138192 press release].