I have 5 Cree CXB3590. 4 of them run on 50Watt maximum (2700K). 1 of them run on 60Watt maximum (6500K). They are on actieve cooled pin heatsinks and never got hotter than 52C• (126F•). The temperature of the cobs is measured on the Tc point with ds18b20 sensors. the auto ignotion point of mdf...