Browse By Manufacturer

DSPM lighting inverter products
STACO lighting inverter products - central lighting inverters for emergency & exit lighting requirements
inverter products - central lighting inverters for emergency & exit lighting

90 Minute UL 924 Systems

LIS only works with UL 924 tested and certified systems, providing you with the industry’s highest capacity and efficiency systems. 90-minute lighting inverter systems for emergency lighting needs provide industry-wide solutions for the current UL 924 standard. Article 700 or 701 of the National Electrical Code, NFPA 70, the Life Safety Code, NFPA 101, the Fire Code, NFPA 1, the International Building Code, IBC, and the International Fire Code, IFC. LIS provides custom VRLA and Lithium-Ion Battery Systems for Central Lighting Inverters.

Lithium ion vs VRLA battery

The lithium ion battery has not fully been recognized into the the central lighting inverter market as of yet. Challenges of moving from VRLA batteries to lithium based inverters derive from the short duration runtime burst lithium ion batteries provide. LIS works with OEM’s who can apply certified UL 924 certified Lighting Inverters and UPS systems, that also work with longer runtime lithium ion battery systems. The 90 minute rating can be achieved. Lithium provides longer life batteries and much less maintenance attention.

Lighting Inverter Sizing

Members of our team are available to assist in the system selection process. You may provide a specification for us to review with you. You may need a walkthrough with an Electrical contact either provided by us or your own. We will assist every step of the way. Sizing review, voltage selection, Battery Runtime options are all important variables in the selection process. Proper documentation of System manuals and technical information are an integral part of the process so that the installation technician or contractor can properly plan and estimate the project.


Battery Maintenance and Emergency Service options are available through our Critical Services Division. We can provide you with documentation for your service plan that perfectly fits your requirements. Care is taken so that every site receives the Service Level attention required for optimal operation and maintenance of certification standards. 7 x 24 NOC Services are available for 100% customer service availability. We serve VRLA, wet cell battery plant, Lithium-Ion Systems, Pure Lead and all other variations.