* The first high power LED to achieve general lighting requirement. * Designed to IED standards, the BR40 ( PAR38 ) series offers an optimal heat sink to assure maximum heat dissipation. * Solid State LED BR40 ( PAR38 ) series from ALT conform to E26/ 27 and E26/ 24 standards and can be used for all E26/ 27 and E26/ 24 indoor luminaries.