LED retrofit kits are the best replacement for metal halides if you do not want to spend money on fixtures.HIDs are of two types: metal halide and sodium-based lamps. The main difference between them is of colors; sodium-based bulbs are orange in color while metal halide is white in color.

The most basic reasons for you to switch to LEDs from metal halide fixtures might be;

• LED-based bulbs consume 75% less energy than metal halides, yet produce better colors and brightness.
• HID bulbs render terrible colors, LEDs on the other hand, render colors compared to those rendered by natural daylight.
• LED lights have a life of up to 50,000 hours, whereas metal halides have a total life of 15,000 hours only.

The direction is more important than intensity. I bet you didn't know that you do not need a lot of lumens, you need lumens in the right directions. The biggest problem with any conventional lighting is that they emit omnidirectional light. Reflectors are used to give the light a direction, which can dampen the strength of light by 30%