Patent Number: 
Section: claims

1. A UV LED lamp, comprising: a pair of end caps; a heat sink mounted between said end caps; a LED segment with a first plurality of LED subassembly packages, said LED segment having a heat transfer plate, a thermal interface material contacting said heat transfer plate, said LED subassembly packages contacting said thermal interface material, said heat transfer plate contacting a first surface of said heat sink; anda first reflector positioned to reflect and focus radiation from the LED subassembly packages onto a substrate,wherein said first plurality of LED subassembly packages is varied in number to accommodate a variable width or length of said substrate. 2. The UV LED lamp of claim 1, further comprising another LED segment and a second reflector, said other LED segment with a second plurality of LED subassembly packages mounted to a second surface of said heat sink,wherein said second plurality of LED packages is varied in number to accommodate said variable width or length of said substrate, said second reflector positioned to reflect and focus radiation from the second plurality of LED subassembly packages onto said substrate. 3. The UV LED lamp of claim 2, wherein said second plurality of LED subassembly segments emits a radiation wavelength differing from a radiation wavelength of said first plurality of LED subassembly segments. 4. A method of curing materials deposited on a substrate, said materials having UV photoinitiators, such method comprising directing UV radiation at said substrate, said UV radiation originating from the UV LED lamp of claim 2. 5. The method of claim 4, wherein a different material is cured by each of said subassemblies, such subassemblies emitting differing wavelengths of UV radiation. 6. The method of claim 4, further comprising cooling said UV subassembly segments. 7. The method of claim 6, wherein said UV subassembly segments are cooled by circulating coolant through a pair of coolant passages located in said heat sink. 8. The UV LED lamp of claim 1, further comprising a plurality of alignment pins extending from one of said end caps. 9. The UV LED lamp of claim 1, further comprising a pair of fluid valves for admitting coolant to ingress and egress said heat sink. 10. The UV LED of claim 9, wherein said heat sink defines a pair of coolant passages, wherein one of said coolant passages admits coolant ingressing said heat sink and wherein the other of said coolant passages admits coolant egressing said heat sink. 11. The UV LED of claim 10, wherein each of said coolant passages is bounded by fin features protruding into said liquid coolant. 12. A method of curing materials deposited on a substrate, said materials having UV photoinitiators, such method comprising directing UV radiation at said substrate, said UV radiation originating from the UV LED lamp of claim 1.