2. What is the difference between model LD-2, LD-3AI and LD-4P ?

• The model LD-2 is used only on autotransformer (CWA) ballast and the maximum HID lamp it can be used with is 450w.
• The model LD-3AI and LD-4P can be used with any type of ballast (CWA, CWI or electronic) and the maximum HID lamp it can be used with is 1000w.
• The model LD-2 and LD-3AI has a aluminum housing
• The model LD-4P has a plastic housing for better insulation.

3. Which of the blue or the yellow lead do we use on the relay model LD-2 ?

• The blue lead is used with all the MH lamp, MV lamp of 450w max and with the HPS lamp that has an operating voltage of 100v (200w to 450w)
• The yellow lead is used only with HPS lamp that operates at 50 volts (up to 150w)

4. Do you make a relay that works on 220 volts ?

• No. You must have absolutely a 120 volts line or tap on your ballast to feed the auxiliary lamp control.

5. How do we connect your relay LD-2, LD-3AI, LD-4P... with our lamp (type, wattage and ballast)

• See diagram connection for LD-2.
• See diagram connection for LD-3AI and LD-4P.