Here's your standards list, but not sure about the cumulative exposure question. IEC 60825-1, 60825-2 EN60825 ANSI Z136.1, Z136.2 FDA CDRH 21 CFR 1040 (US, only applicable to lasers at this point.) Glenn Bob Sechriest <[log in to unmask]> Wrote: | | Looking for a source of information concerning safety issues of working with high intensity LEDs. I | know that looking directly at the LEDs is harmful, and there is a specification that dictates how | long you need to look at a light source of known intensity before eye damage occurs. I need to find | the spec and its source. I would also be interested in learning if the effects of viewing LEDs are | cummulative or not. ie does looking at an LED for 30 sec give the same effect as looking at the LED | for 3 sec 10 separate times. thanx. | Bob | I have been most impressed with the wealth of knowledge willingly shared on [TN]. Thank you all and | Merry Chistmas!!!!!!!! ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################