Participants will receive lower lighting levels in the morning (lighting with A spectrum of 300k, <50lux to the eye level between 7:00am and 10:00am) and the same lighting levels throughout the rest of the day.

The participant will be asked to wear a wrist actigraph to monitoring sleep and activity, daily for 5 consecutive days. From the actigraphy data, change in sleep efficiency will be calculated. A higher sleep efficiency indicates improved sleep.

A blood sample will be drawn to measure Inflammatory cytokine CRP levels. A decrease in CRP levels indicates reduced inflammation.

A blood sample will be drawn to measure Inflammatory cytokine CRP levels. A decrease in CRP levels indicates reduced inflammation.

A blood sample will be drawn to measure Inflammatory cytokine CRP levels. A decrease in CRP levels indicates reduced inflammation.

A blood sample will be drawn to measure Inflammatory cytokine CRP levels. A decrease in CRP levels indicates reduced inflammation.

Physician notes on patient neutropenic fever will be obtained from medical records. Neutropenic fever will be defined as temperature of 38.2 C or higher and an absolute neutrophil count of less than 500 cells/mm. Physician notes are reviewed, and the number of times neutropenic fever is reported for each participant is recorded.

Physician notes on patient neutropenic fever will be obtained from medical records. Neutropenic fever will be defined as temperature of 38.2 C or higher and an absolute neutrophil count of less than 500 cells/mm. Physician notes are reviewed, and the number of times neutropenic fever is reported for each participant is recorded.

Physician notes on patient neutropenic fever will be obtained from medical records. Neutropenic fever will be defined as temperature of 38.2 C or higher and an absolute neutrophil count of less than 500 cells/mm. Physician notes are reviewed, and the number of times neutropenic fever is reported for each participant is recorded.

Participants will be asked to wear Daysimeters as a pendant or a pin during all waking times during the intervention weeks. Light measurements from Daysimeters used as pendants or pins are the closest to light measurements at eye level. The Daysimeter will also be used to monitor the total amount of circadian light received by the participant during the intervention weeks.

Participants will be asked to wear Daysimeters as a pendant or a pin during all waking times during the intervention weeks. Light measurements from Daysimeters used as pendants or pins are the closest to light measurements at eye level. The Daysimeter will also be used to monitor the total amount of circadian light received by the participant during the intervention weeks.

Participants will be asked to wear Daysimeters as a pendant or a pin during all waking times during the intervention weeks. Light measurements from Daysimeters used as pendants or pins are the closest to light measurements at eye level. The Daysimeter will also be used to monitor the total amount of circadian light received by the participant during the intervention weeks.

MDASI-MM, with well-established reliability and validity, is 19-item measure of cancer-related symptom burden. It assesses 13 core symptoms common across cancer types and treatments (pain, fatigue, nausea, disturbed sleep, distress, shortness of breath, difficulty remembering, lack of appetite, drowsiness, dry mouth, sadness, vomiting, and numbness/tingling). In addition, 6 items assess symptom-related interference. All 19 items are rated with reference to "the last 24 hours" on a scale from 0 to 10 with anchors at the extreme ends of the scale (for symptom items, 0 = "Not Present" and 10 = "As Bad As You Can Imagine"; for interference items 0 = "Did Not Interfere" and 10 = "Interfered Completely. Higher scores indicate higher symptom interference. The MDASI-Multiple Myeloma (MM) is the MDASI plus 7 additional items assessing symptoms specific to patients with MM (constipation, muscle weakness, diarrhea, sore mouth/throat, rash, difficulty concentrating and bone aches).

MDASI-MM, with well-established reliability and validity, is 19-item measure of cancer-related symptom burden. It assesses 13 core symptoms common across cancer types and treatments (pain, fatigue, nausea, disturbed sleep, distress, shortness of breath, difficulty remembering, lack of appetite, drowsiness, dry mouth, sadness, vomiting, and numbness/tingling). In addition, 6 items assess symptom-related interference. All 19 items are rated with reference to "the last 24 hours" on a scale from 0 to 10 with anchors at the extreme ends of the scale (for symptom items, 0 = "Not Present" and 10 = "As Bad As You Can Imagine"; for interference items 0 = "Did Not Interfere" and 10 = "Interfered Completely. Higher scores indicate higher symptom interference. The MDASI-Multiple Myeloma (MM) is the MDASI plus 7 additional items assessing symptoms specific to patients with MM (constipation, muscle weakness, diarrhea, sore mouth/throat, rash, difficulty concentrating and bone aches).

MDASI-MM, with well-established reliability and validity, is 19-item measure of cancer-related symptom burden. It assesses 13 core symptoms common across cancer types and treatments (pain, fatigue, nausea, disturbed sleep, distress, shortness of breath, difficulty remembering, lack of appetite, drowsiness, dry mouth, sadness, vomiting, and numbness/tingling). In addition, 6 items assess symptom-related interference. All 19 items are rated with reference to "the last 24 hours" on a scale from 0 to 10 with anchors at the extreme ends of the scale (for symptom items, 0 = "Not Present" and 10 = "As Bad As You Can Imagine"; for interference items 0 = "Did Not Interfere" and 10 = "Interfered Completely. Higher scores indicate higher symptom interference. The MDASI-Multiple Myeloma (MM) is the MDASI plus 7 additional items assessing symptoms specific to patients with MM (constipation, muscle weakness, diarrhea, sore mouth/throat, rash, difficulty concentrating and bone aches).

MDASI-MM, with well-established reliability and validity, is 19-item measure of cancer-related symptom burden. It assesses 13 core symptoms common across cancer types and treatments (pain, fatigue, nausea, disturbed sleep, distress, shortness of breath, difficulty remembering, lack of appetite, drowsiness, dry mouth, sadness, vomiting, and numbness/tingling). In addition, 6 items assess symptom-related interference. All 19 items are rated with reference to "the last 24 hours" on a scale from 0 to 10 with anchors at the extreme ends of the scale (for symptom items, 0 = "Not Present" and 10 = "As Bad As You Can Imagine"; for interference items 0 = "Did Not Interfere" and 10 = "Interfered Completely. Higher scores indicate higher symptom interference. The MDASI-Multiple Myeloma (MM) is the MDASI plus 7 additional items assessing symptoms specific to patients with MM (constipation, muscle weakness, diarrhea, sore mouth/throat, rash, difficulty concentrating and bone aches).

Perceived Stress Scale is a 10-item self-report questionnaire that measures a person's self-reported evaluation of their perception of stressfulness in a situation over the past 1 month of their lives. It assesses a person's feelings and thoughts over a 1-month period. Participants rate each item on a 4-point scale (0 = "never," 1 = "almost never," 2 = "sometimes," 3 = "fairly often," 4 = "often") producing scores ranging from 0-40. Scores are obtained by reversing the scores on items 4,5,7 and 8 like so: 0=1,1=3,2=2,3=1,4=0, and then adding up the scores for each item to obtain a total score. Higher scores indicate greater stress.

Perceived Stress Scale is a 10-item self-report questionnaire that measures a person's self-reported evaluation of their perception of stressfulness in a situation over the past 1 month of their lives. It assesses a person's feelings and thoughts over a 1-month period. Participants rate each item on a 4-point scale (0 = "never," 1 = "almost never," 2 = "sometimes," 3 = "fairly often," 4 = "often") producing scores ranging from 0-40. Scores are obtained by reversing the scores on items 4,5,7 and 8 like so: 0=1,1=3,2=2,3=1,4=0, and then adding up the scores for each item to obtain a total score. Higher scores indicate greater stress.

Perceived Stress Scale is a 10-item self-report questionnaire that measures a person's self-reported evaluation of their perception of stressfulness in a situation over the past 1 month of their lives. It assesses a person's feelings and thoughts over a 1-month period. Participants rate each item on a 4-point scale (0 = "never," 1 = "almost never," 2 = "sometimes," 3 = "fairly often," 4 = "often") producing scores ranging from 0-40. Scores are obtained by reversing the scores on items 4,5,7 and 8 like so: 0=1,1=3,2=2,3=1,4=0, and then adding up the scores for each item to obtain a total score. Higher scores indicate greater stress.

Perceived Stress Scale is a 10-item self-report questionnaire that measures a person's self-reported evaluation of their perception of stressfulness in a situation over the past 1 month of their lives. It assesses a person's feelings and thoughts over a 1-month period. Participants rate each item on a 4-point scale (0 = "never," 1 = "almost never," 2 = "sometimes," 3 = "fairly often," 4 = "often") producing scores ranging from 0-40. Scores are obtained by reversing the scores on items 4,5,7 and 8 like so: 0=1,1=3,2=2,3=1,4=0, and then adding up the scores for each item to obtain a total score. Higher scores indicate greater stress.

Participants will complete the 8-item PROMIS Sleep Disturbance Short Form (PROMIS-SD) during assessment periods to assess the pure domain of sleep disturbances among adults ages 18 and older. Participants rate each item on a 5-point scale (1 = "never," 2 = "rarely," 3 = "sometimes," 4 = "often," 5 = "always"), producing scores ranging from 8-40. Raw scores for the 8 items are summed for a global score; higher scores indicate greater severity of sleep disturbance.

Participants will complete the 8-item PROMIS Sleep Disturbance Short Form (PROMIS-SD) during assessment periods to assess the pure domain of sleep disturbances among adults ages 18 and older. Participants rate each item on a 5-point scale (1 = "never," 2 = "rarely," 3 = "sometimes," 4 = "often," 5 = "always"), producing scores ranging from 8-40. Raw scores for the 8 items are summed for a global score; higher scores indicate greater severity of sleep disturbance.

Participants will complete the 8-item PROMIS Sleep Disturbance Short Form (PROMIS-SD) during assessment periods to assess the pure domain of sleep disturbances among adults ages 18 and older. Participants rate each item on a 5-point scale (1 = "never," 2 = "rarely," 3 = "sometimes," 4 = "often," 5 = "always"), producing scores ranging from 8-40. Raw scores for the 8 items are summed for a global score; higher scores indicate greater severity of sleep disturbance.

Participants will complete the 8-item PROMIS Sleep Disturbance Short Form (PROMIS-SD) during assessment periods to assess the pure domain of sleep disturbances among adults ages 18 and older. Participants rate each item on a 5-point scale (1 = "never," 2 = "rarely," 3 = "sometimes," 4 = "often," 5 = "always"), producing scores ranging from 8-40. Raw scores for the 8 items are summed for a global score; higher scores indicate greater severity of sleep disturbance.

Participants, 18 years and older, will complete the 13-item PROMIS Fatigue Short Form items which asses a range of self-reported symptoms of fatigue from mild feelings of tiredness to an overwhelming, debilitating, and sustained sense of exhaustion that decreases one's ability to execute daily activities and function normally in family or social roles. On the form, Participant Fatigue is divided by the impact of fatigue on physical, mental, and social activities. All items assess fatigue over the past 7 days. Participants will rate each item on a 5-point scale (1= "Not at all", 2= "A little bit", 3= "Somewhat", 4= "Quite a bit", 5= "Very much"). Scores will be summed to produce a total or raw score ranging from 8. (lowest score) to 40, with a higher score indicating more frequent fatigue. If all questions were responded to, a scoring table will be used to generate the T-score.

Participants, 18 years and older, will complete the 13-item PROMIS Fatigue Short Form items which asses a range of self-reported symptoms of fatigue from mild feelings of tiredness to an overwhelming, debilitating, and sustained sense of exhaustion that decreases one's ability to execute daily activities and function normally in family or social roles. On the form, Participant Fatigue is divided by the impact of fatigue on physical, mental, and social activities. All items assess fatigue over the past 7 days. Participants will rate each item on a 5-point scale (1= "Not at all", 2= "A little bit", 3= "Somewhat", 4= "Quite a bit", 5= "Very much"). Scores will be summed to produce a total or raw score ranging from 8. (lowest score) to 40, with a higher score indicating more frequent fatigue. If all questions were responded to, a scoring table will be used to generate the T-score.

Participants, 18 years and older, will complete the 13-item PROMIS Fatigue Short Form items which asses a range of self-reported symptoms of fatigue from mild feelings of tiredness to an overwhelming, debilitating, and sustained sense of exhaustion that decreases one's ability to execute daily activities and function normally in family or social roles. On the form, Participant Fatigue is divided by the impact of fatigue on physical, mental, and social activities. All items assess fatigue over the past 7 days. Participants will rate each item on a 5-point scale (1= "Not at all", 2= "A little bit", 3= "Somewhat", 4= "Quite a bit", 5= "Very much"). Scores will be summed to produce a total or raw score ranging from 8. (lowest score) to 40, with a higher score indicating more frequent fatigue. If all questions were responded to, a scoring table will be used to generate the T-score.

Participants, 18 years and older, will complete the 13-item PROMIS Fatigue Short Form items which asses a range of self-reported symptoms of fatigue from mild feelings of tiredness to an overwhelming, debilitating, and sustained sense of exhaustion that decreases one's ability to execute daily activities and function normally in family or social roles. On the form, Participant Fatigue is divided by the impact of fatigue on physical, mental, and social activities. All items assess fatigue over the past 7 days. Participants will rate each item on a 5-point scale (1= "Not at all", 2= "A little bit", 3= "Somewhat", 4= "Quite a bit", 5= "Very much"). Scores will be summed to produce a total or raw score ranging from 8. (lowest score) to 40, with a higher score indicating more frequent fatigue. If all questions were responded to, a scoring table will be used to generate the T-score.