My website - the ecogro one in my above post, has contact information for UK customers - use the provided e-mail.

BTW if the 3w diodes are simply 3-1w emitters in a single package, the regular 1w diodes will perform almost the exact same. The 3w just has slightly better penetration because more power is packed into a smaller space.

I found a supplier of 100w diodes. It sucks they're just a 10x10 array of 1w diodes, though. I was hoping for a single chip. However, the density of those diodes packed into a 30x30mm package makes for incredible penetration.