Sparked by an email from Jeff B, I talked to Jason and went over what the Guardian should turn off if we lose the PSL light. Previously the LASER_PWR node would turn off the following when H1:PSL-PWR_HPL_DC_LP_OUTPUT < 1:  

H1:PSL-FSS_AUTOLOCK_ON = 0
H1:PSL-PMC_LOCK_ON = 0
H1:PSL-ISS_AUTOLOCK_ON = 1
H1:PSL-ISS_SECONDLOOP_OUTPUT_SWITCH = 0

Today I added to the list:

H1:PSL-ISS_LOOP_STATE_REQUEST = 0

H1:PSL-PMC_RAMP_ON = 0

I tested this by changing the above listed condition to be > 1, and then manually putting it into that state. Everything was turned off, and did what it should. I brought it back and we should be good.